I originally planned to get the Thule Force M 624 as I thought that would be an ideal size for my Honda Fit. But after speaking with a sales rep, he assured me that a larger box would easily fit and offer more versatility. Also, the boxes displayed in the showroom appeared larger than they really are. So, we tried on a Force XL 625 and it looked really good. I also tried on a Force L 628 and that was fine too. I ended up choosing the XL 625 as I wanted to get the longest box and didn’t want to regret getting something smaller. The XL 625 holds 17 cubic feet.
Again, this was not inexpensive. But the quality shows.
I could have likely saved a few hundred dollars if I wasn’t in a hurry and waited for a demo model…