I've used Fitch for a long time and am very happy with it
Our hamsters like it. I find it has no dust at all, which is good! I've been reluctant to try anything else since as I'm happy with it. It has got a bit more expensive recently but still works out reasonable for a 10kg bale. I have tried Carefresh once but found it had very fine dust and didn't like it. I also tried Hemp bedding from Zooplus once - that is also popular but unfortunately I seemed to be allergic to it.