Well... my Throttletek arrived. I have to say, I agree with all the comments and mini-reviews posted here.
Calibration was a bit fiddly, with calibration (or setup) in Windows being essential, followed by calibration in PSX.
The only problems were with the reversers, and I guess I experienced the same basic issues I'm sure everyone else has seen, but I ultimately solved the problems by setting the throttles' aft stop at 975 instead of 1000 in PSX, and then using the technique of triple-clicking the A/T disconnect to synch the thrust levers in PSX with the throttles. Done on approach prior to landing, this has so far ensured that the throttles are full aft when retarded all the way. On takeoff, I stand the throttles up, hit TO/GA, then push them all the way forward. The A/T brings them back to the takeoff setting. So far, this has worked for reverser activation on rejected takeoffs. Alternatively, pulling the thrust levers back and triple-clicking A/T disconnect works as well.
After final fiddling and calibrating, I flew 10 landings tonight, and 10 rejected takeoffs, and the reversers worked properly each time.
What this really adds in terms of "fun" is the proper activation of the reversers: from stowed, to reverse idle, to full reverse, and back again. I had been doing triple-BKSP up until now, so there's some more concentration involved after touchdown, but like I said, it's fun.