I picked this tablet up through a promotion at ATT when I got my Lumia 1020 cell. I've had it since 12/26. It takes some getting used to, but I find I am starting to prefer it over my ipad. Screen size is great and is lovely to look at. On screen keyboard is nicely sized and very responsive. There's plenty of memory and if you have a keyboard cover, this can double as day to day machine that can be toted around. I'm a gamer, but my gaming laptop isn't even remotely portable in that respect so this will good for me when I'm on the go.
Regarding the Nokia Power Keyboard. . . it may be a hefty price, but it will definitely be well worth it for me to get. Keyboard, extra battery, touch pad and two full-sized USB ports all melded into a cover that goes over the whole tablet. . . . big plus. Once I can plug a mouse (or a wireless toggle) into the usb, this really will make it worth it to me.
I find the Modern Apps are pretty good, just need a little finagling considering they're fairly new for Microsoft and there isn't as many offerings. I'm a gmailer, so the fact that syncing by gmail is no longer supported is a big issue, especially since finding work around apps is a little more difficult. But working apps are out there and I'm working with a combo of the Windows Mail,Calendar, People (which are tied together) and the Gmail Calendar app (which has a low rating based on dates from awhile ago but I find works really well). Working in Windows RT and being able to also access the normal Desktop doesn't really bother me. It's again about getting used to working in a different format. On the plus, being that this has Microsoft Office (in some fashion), I'm super happy. I was never able to get comfortable with the Ipad word processing apps.
Overall I'm quite pleased.