Product review (1 stars): Has pluses but has issues, apparently parts not available
*****  This is the third update  *****  7/29/2014

163 days later the parts arrived and have been installed.  The range works fine, I'm leaving the rating at 1 star for a number of reasons.  Waiting almost 6 months for parts is unacceptable, the description states interlocking Continuous Grates - there are 3 grates that have no interlocking features, the description states Automatic Re-ignition  -  nope doesn't exist (in fairness there are flame sensors that will shut off the gas if the flame blows out), and lastly the description reads Country of Manufacture: Spain  -  again not even close the sticker on the bottom of the unit reads Fagor USA Made in China.  I've told them about errors in the ad copy and they haven't corrected it yet

*****  This is the second update  *****

Took 3 more stars away.  It has now been 72 days (yup almost 2.5 months)since the appliance repair company ordered replacement parts for my FA-850SLTX and NOT ONLY NO PARTS but apparently Fagor USA can't even give them an estimate of when the parts will be in.  So unless you can live without a gas range for months and months on end I wouldn't consider this product.

*****  See update at bottom  *****

This review is for the Fagor FA-850SLTX, but I believe that it will apply to the FA-950SLTX also.

THEY USE THE SAME COUNTER CUTOUT!! Both have a pan that fits inside the cutout of 28.74 X 19.29

They have the same configuration the only difference is the countertop real estate.  The 850 is the 30" model and the 950 is 34", at the time of this review they don't have a 36" model.

OK part of the attraction of this unit is the configuration of the burners.  The largest is on the very left side (instead of smack of the middle like most domestic models).

There is a slight latency when starting a burner, once it lights you have to continue to hold the button down for a couple of seconds, otherwise the flame will go out.  I think this is for the safety device to warm up.  And if you read the product features here on Amazon and remember "Automatic Re-ignition", well not on my unit - but it does have an automatic gas shut off (by burner).  So if you are cooking on a burner and the flame gets blown out after about 20 seconds you will hear  slight pop and the gas shuts off (for that burner, just push the spark ignition and it starts right back up).

So far my feelings on this unit are that it is VERY light weight, maybe cheaply built.  When the installer went to put the unit in the countertop neither of the back corners were touching the countertop (it sagged in the middle), the front and right side were flush, but the left side about a " bow in the middle.  At this point I was pretty committed to the project or I would have sent it back.  So the installer and I put a small block of wood in the middle of the back side and gently pushed on the corners to reshape it flat, next we put a small block under each of the left side corners and gently pressed in the middle to get it about straight.  The flame sensor on the small burner was also bent, but functioning so we left it.

The instructions seem not to be written for this unit, the first installation instruction reads
"A.  Remove the screws on the sides of the cooktop burner box.  Use the screws to attach the side mounting brackets."  Seems simple enough, until  a quick search of the unit shows that there ARE NO SCREWS IN ANY OF THE SIDES OF THE BURNER BOX.  Pretty easy to see how it goes downhill from there.  We never did get the attaching brackets to work anywhere.

So the good,
Looks nice, heavy duty grates (not enameled), grates are high enough that an errant pot won't melt a knob inadvertently, plenty of power and lots of well-organized cooktop real estate, automatic gas shutoff if flame goes out.

The Bad
What's supposed to be the simmer burner is way too hot (currently there isn't a good simmer burner on my unit), flimsy construction (but when it's all fit and in place it seems stout enough to support the pans), pretty low Quality Control (besides the warped unit, there was a sensor that was also bent and looked hammered on the top), documentation is poor and incomplete.

So for now 3 stars are all I can give it, but I will write a follow up in a few weeks to see how things are working after I get more used to it.

*****  1st update 3/18/2014  *****

I added 1 star, this is a far better countertop range than my old Kitchenaid (which cost about 50% more than this one).

Not only do I get the extra burner, but the triple burner heats up large pots VERY quickly, and while the largest burner now sort of simmers a pot that's 2/3rd full, it's a pretty fast (hot) flame for a pot with less in it.  Of course you can always move the pot to a smaller burner and simmer just fine.

As for simmering, I called Fagor about some problems that I had and they were very responsive, in a couple of days a service company showed up and adjusted the fine simmer and now I have no problem with that issue.

I believe that there is a design flaw with the grates.  They are nice and heavy - but, if you look at the pictures above the grates look nice and symmetrical running side to side and front to back .  The problem with that design, is that with smaller pots the handles have to be pointing in the direction of the grate supports for stability (a small pot slightly off center may tip in the direction of the handle).  The issue is now all your pots handles are either sticking out the front or back (if you have the space in the back) OR the handles need to point over another burner (which you then can't use).  I believe that the support tongs should come from the corners so the pot handles can point in a 45 degree angle .
Lastly one of my grates was misshaped, it has 1 low support (which exacerbates the tipping pot problem), the service man could see the issue and has ordered a replacement.

My unit serial number is XXXX00000044 which suggests to me that this might be the 44th one imported to the USA.  This is probably why the parts are shipping from Spain and taking about a month to arrive.

Giving an allowance to the newness of this product in the US and I hope that the company improves its supply chain I would now recommend this countertop range to family or a friend.