I have always been a huge fan of the Trailer Aid. I have been using it for about 8 years. 4 tires on boat trailers and 3 tires so far on two different trailers.
Two weeks ago, I had a flat and had to use it (on I-10 just outside of Blythe, CA). The side of the road was so smooth that I could not get the trailer aid to work. I kept pushing it backward down the road. It just kept slipping backward and grinding down the plastic. I had never run into this before. No matter what I did, I could not get it to stop slipping backward.
I had to use all of the leveling wood and plastic levelers I had to get the tire up. I will keep using the Trailer Aid, but make sure you have a backup plan.
2014 Jayco Jay Flight 32 BHDS
2015 Ford F-250 Lariat 6.7L Powerstroke 4x4