Monoprice Maker Ultimate 2

I am thinking about buying the Monoprice Maker Ultimate 2. Never had an enclosed printer before. How difficult is it to change the nozzle, and perform other maintenance just as changing worn linear bearings?

I do not have an enclosed printer, but @irvshapiro1 and @Josh_B own Ultimate 2s. @jackhaen bought one, had nothing but problems with it, and returned it.

Hope this helps!

Can you elaborate more on what type of problems they were?