I also recently bought an EHX 22500 and I really like it. 2 independent tracks that can be synced or not, if they're synced the second loop's length is a multiple of the first one and that can be set to a predefined number or the closest when you press the button. Everything is saved in memories, including the samples themselves. You can timestrech the loops without pitch shifting, which is a nice effect live. You only get artifacts for extreme stretching and they actually sound cool. If you want to use a tempo track you can load your own samples for them, I need to spend some time with that, haven't used this yet. Saves everything to SD card. There is feedback control, which is nice, but it requires using chosing the good option and using the main knob (not that bad). I forgot a few things, but overall I think it's a very nice looper. Its only real drawback is lack of sync input, I asked the EHX guy who wrote the code for it to add something to make it able to process triggers in the exp input as a clock source and he said he'd consider it but I don't think it's been implemented yet, I might need to bugger the guy a bit more
A plus for me when using this is that because the loops are saved I end up with come cool stuff recorded by default






