I've had no real problems with them since I started using them. I get a drop out every now and then (like once every 3-4 months for 10 minutes at a time, and I wouldn't have noticed if they hadn't texted me about it), but I'm more inclined to blame BT for those.

They were supposed to be upgrading me to ADSL2+ over the weekend, but that doesn't seem to have happened. Not too bothered. I'll chase them next week. Or maybe I just need to reboot my modem.