I read reports that the media apps weren't as good as those on my existing AV480 and that the qtopia environment wasn't particularly well implemented and biggest issue for me, there was no word processing or spreadsheet package included with the PMA.
Once these initial teething troubles fixed, I would recommend it. My AV480 is a fantastic media device, combining media with the ability to run software would be awesome.
I will note that using a device like this without a keyboard, be it pull out or clamshell, makes it much less desireable. Add on keyboards just aren't as useful.