I think is Wilkinson unit and the Callaham are the best vintage style trems available for a Strat. In my opinion, these are better than the current Fender options. The Wilkinson trem is well built. The saddle adjustment screws fit snugly into the saddles, as do the intonation adjustment screws. The trem bar attaches better than the Fender bars do. I only have 2 minor complaints with this kit. 1. I wish the saddle screws were stainless rather than black. I think the black looks a little cheap. 2. This kit comes with 3 trem springs. I wish it came with all 5 so all players would have what they need.