The bier garden was great since the weather was perfect in Madison while I was there. The taster flights were served in plastic cups (I hate plastic cups). I tried all the beers (13 total) and only two really stood out, the others were eh. Ghost Ship White IPA and Capsized Imperial IPA.
Rating is really 2.5 and based upon the beers sampled. Lots of options but not that great. If I could bring my own beer to the garden, it would be awesome.