So I recently got a CED 7000 shot-timer.
And yesterday, I just got back from the range with it.
And no complaints. Menu easy enough to use, sensor worked well. It wasn't overly hot or overly bright today so I can't tell that.
One thing I did notice is: Your mind LIES.
There were times where I thought my draw was slow and sucky, but the timer said it was still on par. There were a other times where I thought I was rushed and missed on the draw, but it turns out I wasn't any faster (I still missed).
But was important to realize that shaving some tenths of a second isn't good if I miss the steel.
So yes, I would recommend a shot clock. Provided you've 1) got a range where you can have *some* privacy (the sensor would only pick up shooters within the same bay), and 2) you're the type of shooter that has a logbook. Since there's a lot of neat data you can get to compare your times versus groupings versus guns.
Oh, and if the range allows draw from holster that's gravy. As that's a neat time to checkout too.
But yeah, I really recommend a clock, especially if you want to work on some of the fundamentals. And actually track how you're doing, because again, your mind LIES.