Skater Trainers Review (Should You Buy in 2021?)

For years Skater Trainers have advertised their product to me before almost any skateboarding video here on KZbin. Well, I bought a set of these Skate Trainers and decided to see if they actually do help with improving skateboard tricks... or if it is a big gimmick.
Skater Trainers are these guards you put on your skateboard wheels that prevent you from moving. The idea is that without being able to move on your board you will gain confidence to practice and perfect new tricks.
So the big question, are the Skater Trainers worth your $20 in the year 2021? Or is it better just to practice ollies, shove-its, and kickflips in the grass?
I got my Skater Trainers off Amazon. However, they are also sold on Zumiez as well as the official Skater Trainers website.
At the time of this posting, my skateboard setup is here:
• My New Skateboard Setu...
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