Haven’t seen any formal reviews of paid discourse hosting, so here’s a brief one.
Requirements: I’m starting/helping two new forums, using Discourse for each, and chose Communiteq (formerly DiscourseHosting) to get the first one off the ground. They take care of updates and backups.
Price: Was first going to choose DigitalOcean’s $10 or $20 plan, but since I won’t have a ton of traffic for a while and am low on time and sysadmin experience, chose Communiteq (formerly DiscourseHosting)'s (aka @michaeld’s) basic plan for $20 a month. Also thought about waiting for the formal Discourse hosting option, but my needs were pretty basic.
Support: They answered my pre-sales and post-sales questions within either a couple hours or less than a day. The forum went up almost instantaneously. They have a pretty simple admin dashboard to handle DNS, but other than that you can just head straight to Discourse admin.
Overall: It’s all good so far! If you’re low on time or expertise, I’d recommend them for sure.