Uhaul Vs. Penske

I've read a couple different posts about moving trucks and I've sufficiently confused myself. Everyone seems to be saying that Uhaul is usually the cheapest but I'm finding that Penske is less than 1/3 of the cost of a Uhaul. Uhaul is quoting me $800ish, Penske is quoting $241... Should I expect huge fees or something to be tacked on? Should I hurry up and reserve before they come to their senses? Move is in 3 months and those are the dates I used in the quote. I'm baffled.