I have it. I've noticed they're reasonably good with the weather information for Lake Ontario, but there's room for improvement (sometimes no information, sometimes minimal information). From seeing other's feedback, I have the impression they're a bit more on top of things for the East Coast. I'll subscribe to their service again this year to see if they're improving for my area.
The integration with the Raymarine system is done reasonably well. You can page between screens that show all weather, or combinations of weather and other information such as mapping, and/or radar.