The 6 T23s you see in my .sig were obtained less than 6 months ago, yet they all came to me with some kind of problem (either firmware or hardware). They have all been fixed so that they are completely functional.
If you relax your time limit, then I can attest to the following:
My T23 has/had a defective motherboard failure but no cracks in the casing.
My T23 did not have the above issues but had other defects that required repair.
My T23 has been relatively free of hardware defects.
(edit: Forgot about one T23 that I've sold to a friend. That one also had hardware issues, so make that
7 now-working systems. If you want to include ALL of my T23 purchases, then I have to say I've got one completely dead T23 motherboard that I'm stripping parts off of (cf.
bottom of this thread). So maybe, I should say 8. Of course the simple matter that I
prefer buying systems that have problems, probably should exclude me, and my data, from the survey. That's why I haven't bothered entering.)