There are not a lot of them on the market.

Competition Electronics makes their Shot Timer Pro and Pro II.

They are the standard. Probably the best. I stick with the first version as I think the Pro II is too complicated for my needs.

This is not one of those items where the more expensive it is the higher the quality...

But the Competition Electronics is an small American company with excellent costumer service and they will service your timer no matter how old it is.

AMG Commander is your best choice but you’ll be waiting a while for one.  

I use a Pact timer, works fine.

Competition Electronics models are GTG as well.

Main benefit of the AMG is that it can pick up dry fire.

Take a look into Shooter's Global

I've been using this since 2021 and it's the best I've used so far.  They have a great magnet clip and their smart features are pretty cool along with their app which can take video overlay with the time, etc.  Here's a clip picking up my reload speed when the mag seats - SG timer reloads

I've used almost all of them

- CED7000 is good, I've had one for many years.  Buzzer is too loud and needs tape on it for dryfire.  Clip is not good at all.
- Pocket Pro 2 is a great budget option.  Does everything and has a great clip.  A bit bulky compared to newer ones.
- AMG does a lot of good things, but the wait I've heard is pretty bad
- Pact timer randomly broke on me, buzzer is too loud and it's big.

Competition Electronics is an outstanding company and they make an outstanding shot timer.   I say these things because A) we use them and use them and use them and they keep on working no matter how much abuse we heap on them.  And, B) Competition Electronics will rebuild their timers for a very reasonable fee and will do so in short order.

Great company.

I've been looking and have really had the itch for one. I'm going with the Club Pact III.
T-rex arms has them on sale for $110. They are $130-140 normally. I'm going to get it. I think it will suit my needs fine.

Best on market for Practiscore tie in and simple use:

AMG Labs - Commander

Best individual tool with included app support, video recording with timer overlay:

Shooters Global

Great personal training timer. Downfall is rechargeable proprietary battery:
CED7000

I have a broken CED 7000 in my dead timer collection. I've had one for many many years. PACT Club timer, too.

I've been using SG Timer since 2022 and it's the best one I've used so far.  

I like SG APP with video features.

What do you want to use it for?  Shooting?  Dry Fire?  Both?

I have had a few Competition Electronics timers and found that they really eat batteries.  Other than that, I think they do work well.  There are some issues with display brightness and the display washing out.  I also had to send one back for repair. I now have a CED timer and while it works, I think the people that made the menu structure have never shot a gun.  If I were going to make a timer, it would quite a bit different than what is on the market now (full disclosure: I do embedded hardware/software development for firearms and firearms related things for a living).

I haven't found one that is efficient for dry fire.  For example, with the CED timer, it was more than 10 button presses to change the par time and when you do it 50 times a day, it gets old.  So much so, that I wrote an app for my iPhone ("JBM Dry Fire") to implement and run me through the Steve Anderson dry fire drills.  It's a companion app for his book.  It's free on the app store -- you need his book ("Refinement and Repetition: Dry-fire Drills for Dramatic Improvement") to understand the app.  I think for dry fire an app is a much better way to go.  My app runs me through the entire drill in stages with announcements for each stage and rep.  I don't even have to look at my phone to run a drill.  I am able to do almost twice the number of drills with the app as opposed to a timer.  I also don't have to remember my par times, the app does it for me.

For range use, I like the CED timer because it's rechargable.  I tend to not use par times in practice so I don't care about the button presses.  I do hate the fact that I have to press the review and then start to get the timer going.  Don't know why they wrote the software like that.  Again, I don't think the programmers have ever shot a gun.  With the CE timer, just push the start button.

I bought an SG timer and while it worked, you have to use the app to get certain functionality.  If I'm going to use an app, why do I need the timer?  I ended up returning it.

Disclaimer:  I have no business relationship with Steve Anderson, I just like his dry fire drills.

I have a Club Pact III and like it a lot, but only gets used maybe 10 days a year max.  Does what I need, just the basics