I can only speak for myself, but I've been using the tascam for about a year now for events, roughly 4-5 times a month. The DR-1 worked great for about 3 months. Then it froze up on me randomly and I lost a lot of important audio. Then a couple of weeks later, it froze again. No user error... I set it up, pressed record, everything was working great so I walked away to shoot, came back and the system was frozen. I couldn't afford to lose anymore audio to it, so I ditched it.
A guy I do a lot of work with recently got the updated DR-07, but I haven't had a chance to talk to him about it. When I do, I'll post...