Absolutely a must upgrade for anyone who actually uses their trem on a Strat. I put this on my new 2025 Player II Mod and it is easily one of the smoothest, most stable trems I've ever played. For context, I have some hot rod guitars with Floyds and this is easily as smooth and dynamic. I have a 1990 Strat plus that I installed a Wilkinson on, which I thought was great until I tried the Vega-Trem. It is worlds better in my opinion and orders of magnitude easier to install (I actually had to hire a luthier to install the Wilkinson since it couldn't use the stock term post anchors).
The only down side is if you like a specific stop on the pull up, like the way Landau sets his up to go exactly a minor third up. This is how I set up my Wilkinson and there is a reason for it, but to be honest it isn't a huge deal for me.