I've only used my MJ a few times... and yeah no DTMF, and the sound is kinda strange...It's top notch on a dedicated broadband line, but more often than not I'd have to use it on wireless where the sound gets pretty bad... but I mean it's a neat little toy $20 a year whatever. I'd never switch my Vonage home lines for it, but it's come in handy on the road especially at a certain hotel I frequent that doesn't have LD service in the rooms.
