If you already had a pocket radar, would you up grade or buy a rev fire?
I think eventually I would want to have both, At my daughter's age (8), I don't expect all that much movement, and I don't have a huge need for the feedback yet, I am thinking maybe we will start working on spin after the fall season and I might get one at that time, but I don't see it as a replacement, since we are talking about measuring different things, velocity and spin.
Additionally, I can use the rev-fire as a training aid, but since the balls are not to be hit, I can't use them with a live batter, or for feedback in games. The rev-fire is just a little more specialized in my opinion, since it is a practice only thing, while I use the pocket radar at games as well. I have not had a chance to use a rev-fire yet, so this is just my semi-informed opinion from the specs on their website, and other people's testimonials and accounts. I will very likely get one later in the year, it looks like a fantastic product.
So, I have a ball coach pocket radar, and I plan to get a rev-fire too.