+1 on go for it!
I have been printing with mine for about 3 years now with no clogging problems. The black ink switching does waste some ink, but I don't really worry about it anymore. I will tend to make a run of glossy prints for a while, then later work on matt canvas for a while so don't end up wasting much. The printer is incredible, and I was just looking at some fresh prints last night thinking that it was pretty much perfection. Sometimes I may go a few months without switching from matt to glossy in which case I find it helps to pop the idle cartridge first and give it a gentle shake before switching over.
When you look at the value of the ink that comes with the 3880, and the size and quality of prints it is pretty much a no-brainer decision.