I went for the first time the other day. In case you haven't heard of it, BikePark Wales is a new-ish mountain bike trail centre near Merthyr Tydfil and let me tell you, it is brilliant! Great practice as it happens because the trails had high speed berms, jumps, tight technical sections and steep descents.
Not only that but we unexpectedly had perfect weather, what a day out for only £5!
We got there by 9am and rode up to the top 3 times before zipping down the mountain on a mixture of blue and red trails. The uplift service is £30, I might consider that next time, it would be nice to be able to ride all the trails in one day.
Anyway, we were all a bit spent by about 2pm so off we went, but I'd recommend it to anyone.
There are trails to suit all levels of ability, the blues are great fun because they're fast and flowing, the reds are much more technical. I fancy having a go at one of the technical black runs next time.