I really like this tool. I bought the "bare" tool because I already have plenty of batteries from other tools.
It's really quick and easy to change out the attachments. Literally takes a second or two. Initially I needed it to help me remove old grout from a shower. It was still an unpleasant and tedious job but this tool worked perfectly (with the grout attachment) and substantially cut the amount of time it took to finish over using various other grout removal tools.
Aside from the ease of changing attachments, the variable speed trigger is also a great feature. You don't always want this thing running at high speed. The grip is comfortable and doesn't transmit a lot of vibrations to the hand and arm. You can also change the angle of attachments for working on odd jobs or from various positions.
Battery run-time has been outstanding. At times I ran it for an hour and a half without the battery slowing down. There are a wide assortment of attachments from various makers available.
This is a very handy tool to have around the shop.