Got my wheel last Friday. Love it. I'm coming from a G25 -- which is a damn fine wheel -- but this is a new species entirely: more powerful, more precise, far more realistic, and far more demanding.
I have an Obutto Ozone with a Buttkicker Gamer 2, and despite the heavy shake of the Gamer 2's effects, even with just the clamp the wheel is rock-solid stable so far. In both F1 and Rally configurations, the pedal set-up slips a little if not hard-mounted or clamped (I have the Ozone's pedal plate at its lowest incline), but I suspect that has to do with the realistic brake mod, which I installed without incident (no complaints about the hardware or fasteners). Without the brake mod, the pedals are still several steps up from the G25, both in terms of heft and overall feel. With the brake mod, I've been able to improve my lap times considerably, and I've gotten much better at drifting in a few short days. As a mounting solution for the pedals, I plan on using industrial grade hook and loop fasteners to stop the minimal slide.
I currently have the pedals in Rally mode, which I like a bit better than F1 mode (though perhaps this is only because of how novel is the set-up to me; plus, it allows me to recline my seat back more). My foot plate lined up perfectly when I made the switch from F1 to Rally, and I was able to remove and re-apply the screws without stripping any of them. Having said that, I will agree that if you have the wherewithal to upgrade the machine screws that attach the diamond foot plate to the base plate or frame (in Rally mode), you should do so, because the risk of rounding is certainly there, particularly if you aren't using the best grade hex key. These are tiny screws, and it's relatively easy to overturn them. Also, re-fastening them with the wingnuts is something of a pain on two of the connections, unless you have small fingers or are particularly adept at such things.
The wheel, as I noted earlier, is quite precise, with no dead zone. The FFB is powerful and accurate and, from a tactile perspective, quite convincing -- particularly so when further coupled with the Buttkicker. I have it set now at 5, having moved back from 7.
The rubberized grip on the wheel is actually something I prefer to leather: it isn't particularly tacky, in my opinion, nor does it seem it will readily wear or smooth out. What it does do is help you control the strength of the FFB by providing a little extra bit of hand-to-steering traction. But I suppose this is just a matter of preference.
It's an expensive purchase, but if you are really interested in getting a sim feel from GT5 (and some of the PC sims) and can afford it, this wheel is a very noticeable leap forward, in my opinion. But take note: much of the difference between the technology and build of the Thrustmaster and that of the Logitech is, under game conditions, quite subtle at first. After several hours of acclimating yourself to the wheel, though, it is difficult to go back without noticing the differences. The G25 just feels more like a toy -- though of course both these wheels are just that.
Having never used the Club Sport pedals or had a Fanatec wheel, I can't make any comparisons on that front.
Hope this helps.