eurolines

Has anyone had experience in using Eurolines for their intercity/inter-country transportation?
http://www.eurolines…

I was looking at cheaper methods of transportation to get from country to country, seeing as the Eurail pass is a little pricey for me, and it seems like there are too many rules and regulations so I would wind up getting fined a ridiculous amount anyways.
Eurolines caters to 43 different cities, I believe, and also provides 30-day bus passes, which seems perfect because I’ll only be traveling for 30 days.
However, what worries me is that their website isn’t very clear