Yes I got bitten by their lack of customer support a couple of weeks ago. I did a release and the rails asset pipeline stopped precompiling the resources. I'd tested in staging so this came as a bit of a surprise. I promptly rolled back to the previous release(had been working fine for days) only to find that that now was broken as well. With my production app now broken I fired off a request for support. At this time we were running 8 dynos and 3 workers(not to mention a bunch of addons). This was also Saturday afternoon, which turned out to be a bit of a problem, I received an auto-response saying that support was only available Monday to Friday! Paying the premium rates for heroku and not receiving support for a production failure really was a bitter pill to swallow. We're running fast at the moment and don't have time to switch off but when we do will certainly be looking at the options.