I recently purchased the BoT neck cover through Corro using my rewards. First, love Corro rewards system! Highly recommend. Second, shipping is always fast and easy. The actual BoT mesh neck cover would be 4.5/5 stars. Sizing is accurate and I feel it makes a difference on my gelding. My only complaint is there is a metal snap hook at the top by the ears that weighs down the cover and causes it to fall down the neck. The hook isn't big enough to fit around the halter, I made a make-shift twine loop to hook it to and that did the trick.
Back on Track makes a real difference with sore horses!