tbh Mark, the batteries do use up the power quite quickly, but I also got a drill with mine so I've always got at least one battery fully charged or on charge when I use it. The charging time is about 20 mins.
Too be fair , Blades and accessories can be bought from third party manufacturers and so far prove as good if not better than the original Fein blades.
Bought the blue Bosch GOP250 for around £120. Same power and build quality of the Fein and identical performance. Rate it very highly. Used to have a green Boscsh PMF but it felt pretty underpowered.