as one of the few ppl that modded a n52 with cherry keys (the other guy is banned) i can tell you that it is damn comfortable. I'll go into a bit also
there's the belkin n52 and the razer up'd version called the n52te, aside from the "bling" they put on it, it also uses different programming/macro'ing software than the old belkin n52 and by a landslide opinion is worse than the old n52.
i'd modded 1 n52 with cherry keys and have 2 in storage and 1 on the wifes computer (it just sits there now that we don't play mmo's no more). The difference is amazing with the cherry keys and the non modded n52.
I also visit the ergonomics forum a lot and have modded my own boards and such, i would consider the ergonomics of the n52 to be top notch, and am in the camp that if they made a right handed version of the n52, that would be almost about the best type of split keyboard made.
i don't use my n52 for gaming at all, nope i use it for easy to program macro's for work. I'm an idiot with programming, i just am but with a nostromo i get by very well. And on the occasion when i play a FPS (i can't now i have motion sickness since i turned 30 a while ago, old age i guess) the nostromo is great.
with that said, is this awesome? well the original n52 cost 60 bucks(i bought a few used ones for 20 or so), you can still buy a n52te for 70?, so you gotta ask yourself, is 80bucks worth it for a few cherry keys? Since i only heard about the nostromo 3d mod, i would say yes it is, since no one seems to want to mod anything, and to be honest, the nostromo mod took me 2 or 3 hours? it was pretty simple, but if you want a numpad with cherry keys, this is your only option, you pay a premium.