Tried one of these at Elex a few years ago attached to a mains drill when it was new to the market and wasn't that impressed with it for the cost and the ongoing blade costs
Definitely less work - though I wouldn't call it so much a thorough 'test'.
Watching that video the battery drilling machine they were using sounded like it was struggling and it didn't appear to be as quick as the manufacturers claim
At ÂŁ300 and around ÂŁ40 for a replacement blade set it is not a cheap piece of equipment and I don't see it being any quicker than a multitool and ÂŁ40 buys a lot of multitool blades