As is common these days, assembly instructions were not brilliant, relying on a series of diagrams, but it was fairly logical and worked out well in the end. It runs on 2 batteries, not a problem in itself, but they have to be charged one after the other which doubles the charging time. How much better it would be if it was supplied with a twin charger that would charge them both at the same time. Those are the only minor criticisms I have.
In use it is great, after years of struggling with a mains cable which always seemed to be in the way, how refreshing it is to have complete freedom of movement. All in all an excellent buy and thoroughly recommended.