Yes, yes I have on more than one occasion (It's an out west thing

)
Now I know it's probably too late but what the hell, I just saw this and do have some experience on the TNT Kit.
To start with I do not have any experience with the Clayton kit, let's get that out of the way right now...
I have chose TNT for clearance, my Jeep has gobs of clearance down below and for my style wheeling
that is one of the most crucial things, again I'm talking about West Coast rocks wheeling.
Now, let's clear up some possible SPOBI...
The TNT Belly pan / Y-Link arm mount is beefy. It's made out of 1/4" steel and has a LOT of internal bracing. The only explanation I can give for the bent one pictured above is either it was a very hard hit (were they winching you DOWN? As in the winch was adding extra force to the pan) or maybe he got it way in the beginning and there has been a revision change. I do not see me bending mine without serious work.
Now one thing that irritates me. People go out and buy armor, steering, whatever, they wheel it, bend it, then get on here talking about how crappy it is. That's bullshit. EVERYTHING will bend and I've seen just about all of it bend. Sorry for the diversion of the topic but the never satisfied customer crowd irritates me...
Let's talk build quality of the TNT Y-Link kit (Not of the U-Bolt eliminator or anything aside from the front suspension, I don't have those products as they didn't exist!). On my kit
all welds looked fantastic. That is welds on the arms, belly pad, track bar, and track bar mount. The products fit perfect without modification. This includes the frame stiffiners, the 45 degree bends were placed perfectly and the notches to allow bending (to follow the frame rail) were perfectly placed.
Installation of the Y-Link isn't easy, I'll give you that. The two hardest parts of the job for me were the drilling the side of hte frame rails (for the extra bracing) and cutting off the old lower control arm mounts. The instructions Bob provides are perfect and even I had no trouble drilling the frame in the correct spots (I've always been bad at blind drilling). Take your time with the lower control arm mount removal as you don't want to cut into the frame.
The stiffiners are an easy install and go on very well. Just make sure you are good at welding dissimilar thickness metal together (3/16" to the unibody sheetmetal) so you don't blow too many holes in the faux-frame rails.
On performance. The Y-Link kit performs extremely well. The ride on the highway is about as smooth as a lifted Jeep on 35's can be and the offroad flex is too good! Limit straps are mandatory here (they would also be on the Clayton kit). I have experienced no bind and the driveline does not hit the arms like other people, this is because I followed TNT's instructions to the letter and set my Castor at 6.5 degrees. The only noise mine makes that isn't normal is when the arms contact the part of the old LCA mount that I still have to trim off (it got too late when I was installing to run the angle grinder). Now one thing to note is that as I previously said I am running it at their recommended 6.5 degrees castor, I set the wheelbase at spot on 101.5" (rear axle in stock location), and I'm running approximately 6" of lift.
Workability. Is it really harder to work on the transmission and transfer case with a TNT Y-Link? Hell yes it is, but it's not as bad as they all say. If you secure the front axle in place so it WILL NOT MOVE you can remove the belly pan, drop it down, and work on your junk. As long as the front axle does not move and you keep the vehicle at the same level it was at the belly pan will easily go back into position without ever removing the arms.
On reachability over at TNT... I've had good luck getting a hold of them but that was awhile ago. Their business is getting a LOT more popular right now so I would not be surprised to learn that they are having some growing pains. Once you do get a hold of them though Bob and Matt are both nice guys who will help you through the process.
So there you have it, again I'm not saying it's better than Clayton because I've had no experience with that kit, I'm just trying to give you more of a clear picture of the other system...
Sequoia