It’s money well spent.
I have an A/S Glock 19 that is the same size/weight and functions like the one I carry. Ain’t too many days I don’t practice with it and the time I have put it has made a significant difference at the range.
I’m a firm believer in dry-fire drills, but the airsoft route fills a “spot” that you can’t obtain with straight dry-fire practice. Everything with the airsoft pistol is the same as the “real deal” right up to the point where you have pressed the trigger. The draw, mechanics, sight picture...hell...even the trigger/trigger reset is very similar to my carry weapon. The big difference is recoil, noise, follow-up shots...other than that, everything is exactly the same.
Give it a shot...I think you’ll be glad you did.