I work with one all the time for years now. The thing is as strong as an ox! It can mix anything we throw at it. Yeah the dough hook can be a pain to get off sometimes, and it weighs about #25. You get used to it. The oil seal has gone bad a couple times and it's a big operation to get it fixed.
On a side note we just got a bowl lift that can lift the bowl well over waist high and place it on a table, or tip and pour. What a Godsend!!! Just wish we had got something like it 20 years ago.