Ryöstönmäki main area's got a lot of small-medium sized boulders with various rock shapes and quality from perfect to "not that good". There are a lot of routes from 4's to high end 6's, so it's a good place for beginners and climbing volume. Just grab your pad, walk from boulder to boulder and send as much as you can! Many of the main areas boulders (Puolikuu, Purje, Mini-Me, Outpost, Tolppa, Rinnerypäs, Lakki and Fallen Angel) are nowadays in the open, so they dry relatively quickly.
The main attraction for a lot of us is Jättikivi, a huge boulder with great rock quality, holds and really nice climbing. There are some long routes, up to 20+ moves, not that typical for Hämeenlinna region. Kääntöpiiri and Outpost -boulders share the really nice rock quality with Jättikivi, giving an opportunity to enjoy that smooth rock on shorter routes as well.
Some editors choices of the area:
Jack Of All Grades, The Seven Sisters Assis and Dan Cooperin Testi for those climbing 7's, all of them in Jättikivi.
Mugshot, a really nice 6B also in Jättikivi
Practically all of the routes on Fallen Angel -boulder are well worth climbing
Outpost and Kääntöpiiri -boulders both have really nice rock quality and nice routes