I wanted one of these, but decided to settle on the 6amp beast from smoktek. Since the voltage was off I figured it didn't really matter to have a screen anyways. Not to mention I have enough 3 amp devices.
Maybe in the next version when they get things right I will pick one up. I really liked the idea and form, but the other issues were the deal breaker for me.
That smoketek's a good value and I agree with you on the meter for voltage. I think numbers for that are foolish but, ohms and battery life are useful if you're into RBAs.