Olboy,
The Hydro transmission depending on the brand are usually fairly good. All you need to do is just use it like a manual car, when driving forward you do not attempt to put it in reverse otherwise you will have an expensive repair.
What I am getting to is that when using hydro you treat it with care because if you think that when driving forward you can go straight into reverse without causing problems then think again. It will not happen straight away but in time you will have problems.