I think it's fair to say that the EU summit deal has gotten a fairly muted, if mostly positive response among Finnish leaders. Politicians tend to express satisfaction that few substantial changes were made while noting that the solution wasn't very pretty. Preventing any sort of excitement is that the eventual treaty looks sure to pass in the Finnish Parliament. The original draft constitution passed, after all, and this one will in all likelihood contain almost all the same things merely expressed in a more convoluted manner. Some Social Democrats, e.g. Erkki Tuomioja in his usual manner in the linked article and President Tarja Halonen in a more veiled form at the summit, have criticized Britain for opting out of the EU Charter of Fundamental Rights, but nothing indicates that they'll oppose the treaty.