More information from a Naysayer who doesn’t even use the product.
Get off your security infringement kick.
You share no more using MagicJack than you do when you use any other phone service.
All of them have to comply with subpoenas.

@-midnight,
I have 5 phones hooked up to my MagicJack Plus and all of them have good voice quality and all the features you asked about.
The answering service feature only works on the main phone on the system I’m using but, that’s a phone hardware restriction.