Another data point concerning Lidl's "Tronic eco" AA 2300 mAh: (the green/black labeled ones, pictured earlier in this thread)
So far they've worked fine for me capacity-wise. BUT... some time ago my gf had a pair in a digital camera, and it wouldn't power up (or rather: showed "replace battery" when done so). At the time I ignored it as 'probably forgot to charge before use'.
But today I saw the same thing with a pair of these Tronic eco's, which I know had been charged about 1 month ago, and sat unused since then. A pair of Eneloops charged around the same time, worked fine. Also (afaict) these Tronic eco's do hold their charge in the low-self-discharge sense.
Conclusion: seem to be okay so far capacity and self-discharge wise, but high-current capability might not be good. Sorry... can't be bothered to try and do some measurements on this. Just giving you peeps the heads-up.
P.S. There's also 2100 mAh's out there, which might not be the same thing. And ehm... don't confuse with the red Tronics - totally different beast.