I do a lot of theme and plugin testing often using a starter site. I realized I can save my starter site as an InstaWP template. I created my first site, deleted the plugins and extra themes that come with core, installed All in One WP Migration, migrated my starter site, and saved it as a template. It was fast.

It is not uncommon for the developer to ask for access to the site when I find a bug. When testing on localhost I'd have to upload the local site to a subdomain to give them access. Now I can just share the InstaWP site.

I was a bit worried because testing is not always complete in 7 days, but now that we have the option to reserve all of the sites this is not an issue.

Support has been friendly and helpful. Automattic is an investor, so it seems a safe bet that InstaWP will be around for a while.