Hey folks! I am new to the forum and I just bought a 2015 Sienna. I was an Odyssey guy (2007), and I was super chapped when I got the Sienna home, took out the 2nd row seats, and discovered the stupid trolley on tracks system. I immediately thought I should have either kept the old Odyssey or bought the new Odyssey especially after I read that people on this forum resorted to the stealerships to have the tracks removed. I am now ok with the Sienna because I got it for 4k under msrp and they gave me a good price for my Odyssey. On top of that, I tackled the track removal myself...and it was not very difficult. It did not take 4 hours. Basically, the two center racks are held in by a total of 8 17mm nuts from under the car, and each outboard rail is held in by 3 torx head bolts and 1 traditional (seatbelt) bolt. The hardest part was just pulling back the carpeting...but I was able to leave the side panels in and the entry panels for the sliders intact. I removed the tracks, then decided to simply remove the trolley from each track, then reinstalled the tracks to fill the space. Now my floor is flat and I added 1/2 thick industrial foam/padding/mat and it is a dog van. In summary, if you are bummed because of the stupid tracks that Toyota engineers screwed up, it is not a huge deal to take them out if you are mildly mechanically inclined and up for crawling under your Sienna for about 15 minutes.