I bought this direct from the manufacturer a while back after purchasing the Multi2 pro itself. It's full of accessories and blades you can use for all sorts of purposes, I used mine whilst fixing up my bathroom recently. The sanding pads worked well on the windowsill and I used some of the other blades to remove grout and take tiles off the wall. I even managed to get some old lino up effortlessly using the stainless steel scraper (that's not in this pack, it comes with the tool itself).
I did some research before buying and this accessory pack is the reason why I went for the CEL multi 2 pro and not the Bosch corded multitool. It seems the Bosch does not have as many accessories, just the sanding pads. You get a lot for your money with this pack.