I think even now about 4 or 5 years later it is too early to give a clear answer of the Question.
As for example in neither Syria, Libya, Egypt, Bahrain nor Yemen we have a really positive change of the situation.
Yes in Egypt the people got ride of Mubarak at first, but now even if he's no more ruling the country he was absolved from any accusation and is a free man! Nothing has changed as after the first democratic election in the country the President was imprisoned after a (more or less supported by the public masses) Military putsch and condemned to death! People are neither free nor having enough food nor any positive perspective only a stable regime due to the "Military putsch"!
In Libya, yes Gadahaffi and his family have no more power and most of them have been either killed, imprisoned or living in Exile in Algeria (AFAIK). But the country is a mess and a big factor of instability is the strengthened ISIL there, as we still don't even have a real administration there!
In Bahrain the Saudi's and their Vassals could freeze the revolt of the Shi'i majority ruled by a pro Saudi Sunni minority before it got out of control.
In Yemen Salah is still alive and conspiring with the Houthies to get back to power. The Land is in a civil war, Saudis and Vassals again are fighting the pro iranian/shi'i Houthies!
In Syria the civil war has not yet come to an end while the power of ISIL raises there and in the Iraq day by day. And now Assad's regime could be a partner in the anti-ISIL campaign. The whole country is a mess everybody is fighting each other. The protest movement for more democracy ended up in a "religious conflict" with apparently "endless dimensions".
In Tunisia everything seems to go a good way, but the regime isn't yet stable and still assassination attempts could create some trouble. Especially as the neighbor countries are also not really stable and could export some trouble. Libya -> ISIL, Algeria actually a conflict with the Kabyle Berbers who try to revolt against the Military regime which really rules the country instead of a marionette President Bouteflika who might already be brain dead. A few days ago i just read news that the Algerian intelligence service works hand in hand with terrorists to destabilize the security of Tunisia and helped the assassins to overcome the Tunisian frontier. And we shouldn't forget that the actual President is like Sisi in Egypt from the ancient Garde of the Ben Ali regime. But it's the most promising Land where the protesters might have a chance to meet their goals. As they are many steps ahead in democracy compared to other Arabic countries!