I've had the BWU-SE since shortly after it came out and I have no complaints, but I wouldn't go for this 10keyless. The reason I went with the BW is it simply had all the features I wanted(full size board, browns, 6KRO, and backlit). never had any problem with my BW, idk maybe I got lucky but I haven't experienced any of the problems I've heard about it.
for a bonus, I also liked how they added media keys without screwing up the layout with the FN key, and the 5 macro keys were a nice addition with being excessive(I used to have a G-11...18 ****ing macro keys). I notice some people here don't like macro keys but I personal like a have at least a couple, in certain games they can save you a lot of time and tedious modifier key clicking.
a board with the features I wanted and that I could actually get in a timely fashion proved to be pretty difficult not that long ago. hell even the BW was on backorder. I also don't remember seeing nearly as many backlit boards as it seems there are today, did that just come about in the last year or was I just blind?
either way, I've considered the idea of getting a second, much more compact board that I can take with me, but if I were to get one like that now it'd probably be a KBT pure. I still prefer to have a full size as my main board(I know not everyone does), and that razor 10KL just doesn't seem like it's much more portable.
PS: I suspect the 10KRO is done using the multiple devices trick, which I'm not a fan of but does technically work I suppose.