Judge.me is a superb app that has always been fast to communicate. Probably the biggest feature that puts it above the other apps is the integration with Aftership. If you run a store that ships items at different times, it makes no sense to ask for a review while the item is still shipping. Judge.me allows you to only send an email request AFTER the item has been delivered to their door.
In terms of bugs, I haven't run across any yet and they do lots of complex technical things like Facebook page integration, rich snippets, google shopping... clearly their programming team is top notch.