Looking for reviews/opinions: flash carts...

Hi ,

I recently bought a 256MB EZFA. I'm fairly satisfied with it.

The software is simple and easy, but a little lacking in features. The cart is fast (i.e. games play with no noticeable slowdown), but the power consumption borders on 30% (the GBA SP 10-hour battery lasts about 7 hours when using the EZFA Flash Cart).
Additionally, (unless I just don't know what I'm doing) the USB Linker cable allows for the writing of ROMs TO the Cart but not the back-up of Retail Carts (I had to download ROMs of the games I own, is that legal?). The RTC is a nice touch but not really necessary (not yet anyway, right?).

Effectively, I'm kind of in the market for another cart/linker. Has anyone done a comprehensive review of back-up systems? Or can anyone direct me to a good site?

I've read a little about the 1.8v cart (EZ-2-PowerStar) that is supposed to extend battery life to almost 10-hours... but any reviews and opinions would be greatly appreciated.

Thanks in advance...