I didn't go... As the interest from you guys and my Thai friends wasn't that much I went on a visa run instead!
Reports (Bangkok Post) are that the first day was okay but the scheduling of the bands was terrible and a lot of people didn't turn up for the second day even though tickets were on sale at discounted rates!
Cheerio PS: I prolly had a better time with my MP3 player on the visa run to Pailin!!