I had my thrustmaster for many many years, basically over the time the spring dies or becomes over sensitive, Its a 9 year old stick so I can't say it didn't get its use out of it, considering how many hours I flew from the years - it really got worked over, put into perspective -
I can thrash a Logitech 3d Pro in under 2 tours simply from flying - thats 2 barely 2 months of "not over zealous" use of the stick either.
Warthog I never had a problem with until around June when the springs started to break down and eventually it quit working.
I dont want to invest another $500 in a stick, but instead $350 for CH pedals, stick and throttle.
When you say you've had your Thrustmaster for years, what stick are you talking about? They make a number of them. I own a Cougar setup with a set of older TM pedals. The one complaint I've had with it is the slop in the center. But I've gotten used to it. I'm pretty hard on sticks too, and the less expensive/plastic stuff breaks fairly quickly on me. As far as support....saitek, Microsoft = zilch in support. thrustmaster/guillemot/hercules has always come through for me. Sure you need to either send cash/money order or Paypal acct. But they sell parts SUPER cheap and easy (for me anyway) to replace. I tend to wear the hat switch out on the stick. I use it for views. I want to say the switch was $2 or $3 US. I recently broke one of the gimble pieces in my Cougar. At first I thought the part wasn't available, but then I called TM tech support and found both gimbles (X,Y axis) for $15 US shipping included.
The Warthog is so new I'm sure they are all still under warranty, 2 years, I believe. So if you have a problem with it you should contact TM for repair.
I'll also say I've always heard good things about CH stuff. I get the idea they don't sell parts though. They do however, I've been told, offer a very reasonable refurb fee on their sticks.
I'll throw this out there. If anyone has a TM stick they believe is broke, PM me. I'm not at all sure that parts for their inexpensive sticks are available but if you let me know what you have and want someone to fix your stick I'll research it and we can talk about getting it fixed. I know I can fix almost anything with the Cougar,except for the centering slop, you would prolly need a NXTmod for that.

Jenks