There is a good analogy between the multimaster and its competitors and any Festool and its competitors: priced way more, but worth every penny! When Fein's patent lapsed, a whole bunch of others jumped in. Most of them suffer the same problem that some people reported with the old multimaster: the screw holding the blade can come loose during operation. The lever system in new multimasters completely solves this.
Somebody mentioned the contour sander attachment. I have one and offer this advice: only run it on minimum speed. If you run it fast, it overheats, the plastic softens, and the whole thing flies to pieces (DAMHIKT).
Blades are indeed pricey. In that regard, Fein seems to take a different road from Festool. I have always thought Festool's tools were dear, but their consumables (blades, sandpaper, etc.) were reasonably priced, like they wanted to keep you happy after purchase. Fein's blade prices are close to outrageous. Here in the US, Woodcraft has started selling Imperial blades at prices significantly lower than Fein. But also, my local store buys the bulk packs from Fein, breaks them up, and sells the individual blades at the bulk price, which makes them much more competitive. It would be worth asking your vendor if they would be willing to do that too.
Steve