I started out with the CED Millennium 2 and really liked it. However, it proved unreliable. I had a sensor go bad, and had to buy a new one, which wasn't cheap. Then, the console itself failed. I gave up on it.
On Charlie's recommendation I went with a Shooting Chrony, and am pretty happy. It seems to be reliable, and folds up into a pretty small package for transportation and storage.
Some of the things I've learned about chrony's:
1. The software is universally convoluted, involving non-intuitive button pushes, confusing on-screen abbreviations, and non-sensical error codes. I don't depend on the software for anything except basic shot values. Record them on paper as you get them, then erase the machine's memory and start the next string. Keep it simple.
2. Because of #1 above, eschew bells and whistles. Get the cheapest model of whatever you decide on, because then, when it goes south (or when you kill it with a bullet), you won't feel bad about leaving it in the range trash can and buying a new one.
3. Don't scrimp on the tripod. Get a tripod with some heft to it, one that will stand up to wind and balance on uneven ground. I use an old standby from the '60's, an original Marchioni Tiltall 4602 that's usually available on EBay for about seventy-five bucks. IMHO, one of the best tripods ever made.
4. If you get the Shooting Chrony, be aware that there's a standard female tripod mount built into the little remote console that sits on your shooting bench. Get a miniature table-top tripod for it so it sits up looking at you, and you barely have to move your head to read your results. Very handy.
5. When using a crony, it really helps to have an assistant. The positioning and adjusting process is much easier if you don't have to keep running back and forth between the tripod and the bench, and having a recorder means that you can maintain your shooting position, rather than having to break your hold to manipulate the crony controls and record results.