I'm into my second year with Insat and have found them to be as good as they need to be; ie, they responded quickly when i first joined (sending all the equipment), and later when i've had questions.
Obviously they're not spending GBP 100+ / year looking after my account, but it comes down to money vs what you end up with. I consider it money well spent
(escaping the dodgy Italian soap operas dubbed into Swiss German!)