I have one that I use for 10m Pistol shooting.
To get the best out of it you really need some training. The documentation supplied is not very good.
Also it is for training, don't think of it as an electronic target. It does score, but is not the same as shooting at true electronic or paper targets.
I did a Scatt course at Holwell RC (Which I am now also a member of
) These do run now and then when enough people are interested.
The information Scatt provides can be really useful, It can show things like a botched trigger release or consistency of your hold.