____miah
Apps are pretty much limited, but it's a pretty new platform so we'll just have to wait (or code it ourselves). I don't usually erase SMS and I think it causes a bit of a lag when having tons of messages in your inbox. There will be a slight delay when creating messages if that is the case.
Calls are pretty decent, sometimes though, there's no sound in a call and have to stop the call and redial. I'm not sure if it's because of network problems or because of the phone.
There's this feature about sound issue in FFOS, where it "cares" when you've been listening in full volume and using earphones and automatically turns the volume down. I don't like it pretty much, but it's neat.
Also, there's still no copy-paste in FFOS 1.1.
All in all, I'm still using my ZTE Open, it's does the basic stuff but it might not suit you if you're used to IPhone and Android phones. I haven't tried other FFOS devices but if I were you, you can hold it for a while and wait for new devices to be released.