I've read tons of stuff about these radios being terrible, but it seems like most of the complaints are from before the most recent firmware updates. I'm getting ready to take my chances tomorrow and buy the Mini and Flex, but wanted to see how these are working with the updates. Anyone have any advice? I'll be using a Canon 5D Mark II and a 580EX to start with. I'll mostly be using in studio with manual flashes, but I'd like the ability to use TTL on location shoots on occasion. Thanks.