It is several years old. I think it came out around the same time as the Ramona (or maybe the prior season), which was such a hit it left every other Choo bag in the dust. Personally I like that it is a more medium size bag...but I don't have one. I don't own a Ramona or a Mahala either, tho. Riki and Maddy are more my size.
I have a Rasia and I have a Riki and to me, there is not much of a difference in size. The main difference is the Riki has the two straps but the Rasia has a longer shoulder strap that can be lengthened (like the ayse).