I also like the Thrustmaster FFB.The T150 gives very good information (at least with the friction free mod) of the initial moment when the rear starts to slide.
With the CSL Elite Xbox stock version this initial moment when the rear starts to slide was difficult to feel or it was coming with slight delay.Also I could feel that the belt was loose when there was a change of direction of rotation.This led me to disassemble the steering wheel in first week and violate the warranty.
Holding the shaft of the electric motor to not move,I could catch the axis of the steering wheel and move it with bare hands slightly to the right and left(unattached steering wheel).For me this loose belt is a big problem.
After the belt mod this initial moment when the rear starts to slide is very clear and without any delay,and with the speed of this wheel is very easy to catch slides.
This is probably because the construction of the CSW v2.5 allows high tension of the belts.But I would not buy
dual belt drive wheel.Which reminds me that the latest and most expensive wheel from Thrustmaster is also dual belt drive.
I think it's time for Thrustmaster to switch to single belt drive or direct drive wheels.
If you want significant upgrade from the T-GT start looking at the direct drive wheels.