I was premium few years ago when Neopets still had some movement... well, today I can't say if it's worth or not, but as people said, it compesates:
1. The SSW. It's the main reason I'd buy premium again.
2. Battledome + Nerkmids + Bubbling Fungus. It's pretty rentable over time and Nerks are very ETs.
3. Premium perk for changing the specie of the pet once. Despite MP now being cheap, it still rocks, for me.
4. The premium monthly wearable, if still working. I had tons on my wardrobe!
5. The free pet space. It's good for those who like having more pets.
I was interested in signing premium yesterday! But I'll wait for premium sale since this board helped me on rethinking my decision.