I have 2- and 3-reel Patterson tanks and 1, 2 and 3-reel Nikon tanks. I almost always use the Patterson reels because they are easier to fill and empty and because I find the reels easier to load, particularly for 120. My major complaint is that the lids are hard to get on tightly; I probably lose all of the time saved pouring in the developer while trying to get the lid on all the way.

Regarding heat transfer, I assumed that plastic, as a better insulator, would keep the temperature more even: no heat increase from handling the tank during agitation, although that would be very minor.