Not tried one personally and Ashdown have now discontinued them. From what I have heard speaking to dealers, it's because they weren't particularly reliable.
Having said that, they've got to be one of the cheapest compact amps around and a great backup that'd probably fit in the pocket of your gig bag. They were so cheap at one point earlier in the year, it was almost daft [i]not[/i] to buy one. Not so many around now, but if I saw one cheap enough and with a full warranty, I'd seriously consider it as a spare.