Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: They work correctly in a Nikon d-600 ?
Document: While the units have worked great on my Nikon speedlites, a big surprise was the ability to get high speed sync on my studio strobes. The sync works all the way to 1/8000 giving me the ability to work with an F 1.4 and the resulting shallow depth of field. I couldn't be happier.
The Pixel King seems to work much better with Canon products than Nikon. Canon's e-ttl system is simpler than Nikon's i-ttl system, yet ultimately it is more useful for radio wireless remote control of an off camera flash. Nikon's CLS is more versitile, but versility makes it more complex. Complex means expensive, especially when designing wireless control systems and especially when you are trying to adapt an optically based wireless system to use radio based signals. I think Pixel pulls it off very well with the King.
I would give this 2 1/2 stars if possible. The reason for the less than stellar review was that one of the receivers in my order didn't work right. The good receiver would operate in full TTL mode, which was a major selling point for wanting this system. It's hard to find a good TTL set of triggers, let alone ones at the point.The problem was with the trigger that didn't recognize my flash correctly. The one trigger that did work as promised worked pretty well.
Well they work how they say they do. I have only used them a few times to test out the features and they work great. I was going to go with the flex tt's from pocket wizard but for $200 I got the same features I wanted. I really wanted them for the high speed sync and it works great as well as the TTL There easy to set up with just a glance through the manual. I use them with an sb800 and sb600.
This product works well inside and out. I use the Nikon digital single lens reflex system with three speedlights often for wedding and portrait photography.
I rely heavily on my Nikon AF assist in the dark of the night during receptions - and the AF was very reliable. Now that my camera thinks I am using i-ttl flash, the AF assist within my Nikon bodies do not function when the Pixel King transmitter is on my bodies. This wouldn't be an issue of the PK lamp was useful, but it is WAY too weak.
Using this on my Nikon D7000 with SB700, and 2 SB600's on the receivers. So far, so good. They are light weight and the set up was a breeze (I literally clicked "on" and they all worked). I'm glad I didn't splurge on the PocketWizards when this is exactly what I needed (and I can't afford them after my $2K lens I just bought!). Thanks Pixel!
So I bought these because my friend with a cannon said they worked great. Ordered came fast and was easy to put together. Works great in ttl mode and there is plenty of adj using the exposure comp. in camera. What you cant do is use manuel for flash setting and control from the camera. Cannon has this feature but nikon does not. If you want to shoot manuel flash instead of ttl with these u will have to change you flash setting by hand on the flash.
I've only noticed flash inconsistency when using light modifiers such as snoots on my SB-600 or 800.- the transmitter and receivers look too similar - they need to change something on the transmitter to make it stand out from the receivers.- the bracket on the receivers need to be metal, just like the transmitter (the receiver feet, where they would connect to a flash bracket or the like). I had a light stand fall about 10 feet, and although the receiver still functions, the foot cracked.
We use this with out Nilon D500, SB 700 flash and some studio lighting. Triggering is reliable and fast. I think we have only had one no-fire so dar and that was in the field and perhaps subject to interferance. Retried and it worked fine.
Answer: I've used them multiple times with the Nikon D600, D700, & D7000 with both SB-800 and SB-910 and they have always worked fine.