I bought a set so that I could get my RV-10 (still under construction, but on the gear and with engine hung) into a 2 car garage that only had single size doors. This meant that it had to go in at an angle and be able to slide sideways to get it to fit. Getting the plane onto the aero-rollers was fairly easy, although you may need two people depending on the weight of the plane. The other thing to keep in mind is that whatever surface you're rolling on has to be absolutely flat. The rollers have about 1/2" or less clearance on the bottom, so if you've got to take them over a lip or a surface that is uneven, they'll tend to bottom out. Overall I was satisfied with the purchase.