$166 more already assembled?, that's a no brainer in my mind. I have little time to do things as it is. Plus, if you have no experience, you could cook the components, damaged the board, there is some finesse involved when it comes to soldering, not everyone can do it.
Personally I would not mind doing it myself, but like I said, $166 more all assembled, best way to go. I.M.O. Save up a little more $$$ no worries.
Plus like CNC said, if there is a problem after they assembled it, you can get it taken care of.
