For how long have you been using it? What thing do you like most/least about it? Did you try many other models before getting this one? What is your opinion about the value for the price? Knowing what you know now, would you make the same choice? * ...

The AR-2330 Pro (I think it lacks a "0" in the statement). Ets a large system voltage regulation and de-worming of all that could harm your power line.

This is mega heavy (like 20 kgs), but it's effective. Is the price, which hurts a little when we say that this is "only" to control and eliminate parasites. Until the day we try and hear the difference, subtle but real.
There are not many alternatives to my knowledge, so I took the best-known brand.