Product review (5 stars): Consider this the KRS-2200 and disregard the old reviews - **6 year update!**
UPDATE:  Six years, still working great.

For starters, stop reading reviews prior to 2011.  The early issues with this kegerator have been addressed to the point Nostalgia really should assign it a new model number.  As reported by others the regulator is now a pretty nice dual gauge unit, with a lockable output valve.  Meaning once you get your CO2 settings dialed in you can lock the knob so it doesn't get changed accidentally while changing out a keg, etc.  Also, the unit is dead quiet.

The instructions have been completely revamped and are very easy to follow.  All the spare parts provided have been labeled in the manual, no mysteries there either.  Before this arrived I downloaded a PDF copy of the old instructions, and it's true the early buyers were basically left in the dark.

I followed the instructions, charged my tank, threw in a 1/4 barrel, and no problems at all.  The beer has a perfect head on it, and my monitoring of temps have been hovering around 34-35f.  That's with the thermostat set to maximum, so I'll be watching that closely.  I don't want my beer to freeze!

A few things to note:

1)  The keg tower rubber washer (#5) was not already installed, and is not really mentioned in the manual.  Be sure to install it otherwise there's not a tight seal between the tower and fridge and cool air will escape.  You'll know if it's not on because the tower installs too easy and doesn't feel tight.  The nice side effect of this design is that the tower is basically cooled, so less stale beer in the line.

2)  A 5 pound CO2 tank will fit with a full 1/2 barrel, and can be bought at a local gas supply or welding shop filled for about 50 bucks.  Refills on the tank are around $9.  The 2.5 pound tank shipped is fine, and I'll be filling it so I have a full tank at all times.  The 2.5 pound tank should be able to dispense 2-4 1/2 barrel kegs, the 5 pound tank 4-8 1/2 barrel kegs.  Tighter fittings, lower CO2 settings, more kegs...

3)  The casters are optional, and there are already self leveling feet installed if (like me) you prefer the unit to be shorter and stationary.  Height to the top of the fridge door is exactly 31 inches without the caster installed.

Anyway, given all the features and the insane price of $380 shipped I can't see how anyone could be unhappy at this point.  All the negative reviews made me really ponder this purchase, but I'm happy to report they're all talking about a different product.  I'll post a follow up at 12 months, or before if I experience any problems.

And thanks to the early buyers who posted reviews!  Nostalgia listened and thanks to you I have a really nice unit.