I put these on my 2010 FLHX and did a 2400 mile to the north coast of Scotland and back. This suspension is one of the best items I have ever purchased. I never bothered with upgraded suspension on my previous bikes, but decided I would give it a try after reading the forums. The bike tracks better in corners, glides over bumps much smoother, and stays way more stable than the air suspension when packed or riding 2-up. I don't know if the higher end are better, but these are fantastic especially for the price.