With their generous portion sizes and a more-is-more approach to seasoning, Vegemesta has provided many a delicious midnight snack for me. The menu in Turku is limited compared to the ones in Helsinki and Tampere, but luckily enough the best items are available - provided they aren't out of stock, which is often. Vegan options are great, but fairly few. The place is tiny; there's only space for a max. of 4 people to dine inside.
I highly recommend the locally-produced sodas!
Cons: often out of stock, somewhat inconsistent quality