Blofeld is amazing, its practically a digital modular synth. Filters sound really good to (thats coming from a moog fan boy lol) i have had as few issues with it, like the memory problem and it freezing but with the the newest OS (1.16b I think) and having a mod that was recomended by the folks at waldorf (an SMD cap soldered inreplace of one of the other caps for memory storage) I really haven't had any issues since. I do recomend getting one of the free blofeld editors though to back up your patches. I do this maybe every other time I play with it just to keep my mind at ease.
And even with only a couple knobs and buttons, its pretty easy to get around (I'm also typically a knob per function guy)
I would think it would be worth owning multiple waldorf synths, even if they cover a lot of the same ground. They all have their unique charms
My modular so far: Q104, Q106, Q107, Q108, Q109 x2 , Q116, Q118, Q127 w/Q140, Q130, STG Wave Folder, Encore UEG playing with Moog Voyager, VX-351, CP-251, MF-104M (x2 STEREO!) and Yamaha RX5