What's iffy about it?
The naysayers seem to all be people who haven't tried it yet. Just about everyone who's actually handled it loves it. Apparently even EGM, usually a bit on the anti-Nintendo side, loves it, and has put the Revolution on the upcoming June issue (as opposed to, say, the PS3). They warn that the scary thing about it will be the line-ups at E3. o_0
If my hands-on impressions are worth anything, I'll likely be glad to give 'em when I get back. I don't know how often I'll be able to log on during the week that I'll be in LA, so you may hear a lot about it before I even get a chance to write anything up.