good question tiresmoke. I have some eta that haven't been great, but I have 2 cheap 21j reps that I wear often and I mean they are accurate to the minute and have been with me for sometime now! They look and run like...well....clockwork.
I sometimes wonder myself if the upgrades are worth the extra $$$ too. I will add though that eta can be repaired by most jeweler if you ask upfront, but asian, not so much.