I LOVE LOVE LOVE my chicken fountain! Definitely get the winter kit as well, since...well...it's winter! Since I "winterized" my fountain i've had no issues.
Assembly is very minimal - it consists of inserting & gluing 1 pipe & lining up pre-drawn dots. The glue is included. You screw on the hose inlet (unless you want to wait until spring since you water hose will freeze in winter - no good way around this, but it holds enough water for a few day unless you have a ton of chickens). All the nipples are installed, the valve is installed...it's truly that simple! I have a review of my "construction and installation" on my blog here:
http://www.secreturbanchicks.com/2014/06/spoiled-chickens-make-better-eggs.html
If you have specific questions, especially about winterizing, feel free to shoot me a PM. Or better yet, contact the Chicken Fountain owner on his facebook or webpage. He is VERY nice and loves to help potential customers & owners with questions or concerns. I've contacted him a couple of times with questions.