I don't do subs either, but I think Infuse is so good I made the one exception. I've been using it for about a year and haven't had any issues. It does everything I've wanted it to do. However, at $10/yr for the subscription, that lifetime price is way too ridiculous. I'll pay the sub and move on to whatever looks better each time the subscription is up for renewal.
I've also read various app reviews that lifetime only applies to the current version (i.e. 7.x), so you'd have to pay lifetime again for the v8. I can't verify this of course, so take it with a pound of salt.
The only irritation I've had with Infuse is that it only understands "aired date" metadata. If you have something in "dvd order" it can't download that. This is a problem people have complained about for quite a while. I don't think this is an issue for you though since I think you're getting your metadata from JF anyway so Infuse doesn't have to do it?
People completely missing the point for an opportunity to shit on Apple is on brand though. Lol.