The BOTs I believe are not Magnetic...
I personally would LOVE to own BOT sheet along with a couple sets of the No-Bows, but that is when I win the Mega Millions lol.
I do however use Magnetic products and have had results. I use a DuraTech Mag. Sheet on my gelding the night before he runs and it stays on till we tack up to go warm up. It really relaxes him and he looks like a stoner lol gets super relaxed and loves to wear it and he runs harder and stronger. I also used it on a few other horses with great results, along with the hock wraps I used on my mare and seen a big difference in her performance.
I find them to work wonders but sometimes depending on the horse it does nothing for them. But the BOT are VERY high quality product and worth every penny, I know a few pros that use the BOT products and they work wonders on keeping their horses going strong throughout the year.