It Depends
On what you are going to use it for.
I use a Chronograph quite often, but what I mostly I use it for is to get direct comparisons. For instance, I might be trying a new lot of 133. I will load up some rounds from the old lot, see what they are doing, then load the new stuff by weight, and see if the velocity is within the statistical norm. This is how we find out if one lot is more dense, or what ever.
Another example is the 30BR. I know that the 112 BIB bullets I shoot like something right around 3000fps. I can set the Chrono up, load it untill I get 3000, then tune a little on either side of that.
Lots of times we will compare rifles, many of us shoot the exact same combo, if you shoot the things within 10 minutes of each other, you can get very good direct comparisons.
You don't need a super expensive Chrono to do this type of stuff. Especially if you have a basline load like I alluded too earlier.
If you are going to be doing serious ballistic work, where you need accurate ES, SD, and velocity spreads, (such as in long range shooting), you DO need a high end unit. Just knowing how fast something is going will not cut it in that game.
I do have a 35P, it stays at the Range, all of my friends are free to use it. The printer quit last year, but for what I use it for, I could care less.
In my opinion, a Chronograph is like a automobile. Some are satisfied with a low cost unit, others need to spend as much as possible. But, if all you are using it for is going to work each morning, all the more expensive item does is let you say, "look what I have". But, if you want to cruise in style down Richmond Avenue, that Corolla ain't gonna cut it.......jackie