Had one. Sold it.
Just too many limitations. If I'm just going to consume content, I'd rather have a tablet. If I'm going to play games - well, none available really (there are some for tablet but I still like more complicated ones which means a laptop). If I'm going to get some work done or create content, forget it.
Writing on it was OK but...using what? Not office, easily - yeah, there's office online and Google docs, but I'm one of those guys who uses those 20% features in Office. No Scrivener. SSH and RDP (chromote) is possible but painful. My password manager (PasswordSafe) wasn't available...nor was Dropbox...nor any kind of IDE...nor Adobe tools...nor hobby tools like Poser/3D tools...etc.
It just didn't meet my needs. If I'm going to relax, I grab my tablet. If I'm going to work or be productive, I grab an old laptop (and maybe remote into my desktop).
YMMV.