Well, I placed an order for a CycloDS Evolution and a elink 1GB GBA cart. I know the EZ3in1 would have been better for stashing in the DS, and I may still get one later, but the elink was the biggest GBA cart that would still in work GBA hardware (GBA, GBA SP, and GBA player attachment for my 'cube) so I got that. Down the road, I may get a 3in1 made for the DS lite, but that’s only if I end up really wanting rumble and the web browser ram.
The Acekard was my second choice; the built in RAM sounds awesome, and I’m all for open source projects. My main reasoning against it was uncertainty about the USB connector on it; Thats a ton of crap inside that little slot, and I’d want to see one in person before I paid for a cart slightly too large for the slot. Plus, CycloDS has a larger install base. If I had seen one in person and felt ok with the USB connector, I’d have gotten this one.
As for the oft mention R4, hell no.
'Well get a genuine one": and how the hell am I supposed to know a official one from a clone from a postage stamp sized picture on a foreign website? Hell no. This is simply maliciousness from the makers, for a product that doesn’t have the feature set of the CycloDS or Acekard. With the maliciousness of the creators, plus the lack of large miniSD card support (SCHD I think its called?) as downsides, there isn’t a single perk to an R4 over the CycloDS except maybe large user base.