Although forums like this (TDaily, MyTT, TT-news, OOAK, etc) are very useful and informative, you always have to take many impressions/reviews shared by others with a grain of salt. Impressions of equipment is very subjective and depends completely on what the specific person is comparing to. The topics of Rozena is a classic example (especially on tt-news). T05 users will say Rozena lacks spin, T64 users will say Rozena lacks speed and T25 Rozena users will say that throw of Rozena is too high. Less experienced players will say Rozena is very fast and more experienced/offensive players will say Rozena lacks speed. Then you have a lot of people who developed some kind of hatred against Butterfly (because of their pricing- and/or distribution policy) and will say Rozena is crap regardless and you are better of with ESN rubbers. And here you go: 6 completely different opinions about Rozena , all based on individuals own experience/reference.
I'm not saying all reviews are crap, as there are some very decent (and objective) reviewers on the forums, like YogiBear, NextLevel and AndySmith for example. (and surely there are others but I can't mention everyone)
I always encourage people to try new equipment themselves. Ask around at your club and see if you can try their blades/rubbers etc.
Having said that, let me share my personal opinion on the rubbers mentioned in this thread. (playing TT for over 25 years, two-wing looper at a decent level, controller offensive based on spin and placement of the ball, rather then speed)
Played Mantra M for 6 months and it feels harder compared to other medium rubbers. It's also pretty fast , but still gives you the necessary control. And it definitely generates enough of spin. For me, the Mantra M plays better on an allwood blade, as Mantra M on a carbon blade felt a bit too hard.
Genesis gives you a lot of spin, but less speed. Not saying it's slow, but due to lack of catapult, the rubbers doesn't feel fast for me.
Stiga had a big miss with the Airoc rubbers, but with Genesis and Mantra, they have some very good rubbers.
Rozena is an allround offensive rubber, on par with ESN rubbers. The spring sponge feels different to ESN rubbers, which might be the reason ESN-users experience "uncontrolled bounciness" with Rozena. Not sure who said it, but I think it was mentioned on this forum: Rozena is a jack of all trades, but a master of none. This actually describes the Rozena in a single line.
Again, this complete post is based on my personal thoughts/opinion.