I use them as well. Cheap, reliable and easy to use. I only had trouble once, where I was caught in some sort of anti-spam measure and they blocked my account. An email to their support fixed the problem pretty quickly though.
One thing to look out for is to determine where you want your backups. You can’t change your account’s server location after you create your account afaik.
I have looked at the routing on routes I regularly drive and it seems like Magic Earth has a better routing algorithm than Organic Maps. At least it doesn’t try to send me through the middle of a town when there is a route around the town using the highway as Organic Maps often tries to do.