I set it up in about 2 minutes to do a simple load test of a client’s site (though 5 pages). They make it free to ‘test drive’ their service (though the free not enough to actually stress your site). It is extremely easy to test a path through a publicly facing system.
The report was good enough; you get screen captures of pages that have failures, and they do a good job of making some of the performance data pretty and intelligible. Again, I didn’t really load test anything, so I didn’t examine the report as closely as I would have in a real world scenario. The service is built using Selenium, and I believe they allow you to upload full featured selenium tests (if you have already invested in this technology, but don’t want to build out a cloud network).
This service is of particular interest to me because last year I was part of a project that built a selenium grid on Amazon EC2, using these instructions.
If we’d known about BrowserMob, I’m not sure we would have used them, as I don’t know what our budget was, but it would have been nice to have that in the evaluation mix.