I upgrading my Gameboy Advance 2 months ago, and got this emulation cart to go with it as I didn't want to have to swap between the games I had or carry multiples around when I took it places.
I've used my Gameboy every day for the last 2 months, and this cart has played every game I've run though it. Including Romhacks for Metroid Zero Mission! No crashes, no save corruption, quick booting into each rom.
It really just works so easily.