This is a very nice Swedish-made medium rosin. Many players consider Nyman and Carlsson (one of my personal favorites, also made in Sweden) to be pretty similar in feel and consistency, though Nyman's seems to be a little "harder"; some players swear to it being a good "warmer months" alternative to Carlsson, keeping one of each in their bag.
Rosin is key in getting a good bowed sound, so don't cheap out on this key ingredient to success, it can last a long time - and isn't very expensive. In fact, some bassists carry two or three different cakes just in case the environment makes another consistency better for that particular situation. When the humidity is high, the more powdery, harder rosin is usually best, and during very dry periods some stickier stuff may be needed.
New players: I include my tip sheet concerning the care and usage of rosin.