We actually are not going to finish the Starter Set. We played a 7 hour session (normally 8 hours, but the first hour was spent explaining the differences between 4E and 5E, and answering any questions about information found on the character sheets). The PCs got past the ambush, the goblin caves (where the party tricked some of the NPCs into coming to the cave mouth and then flooded them after the BBEG fight), had interactions with most of the NPCs in Phandelver (this probably took at least 3 or 4 hours of roleplaying), and three of the tougher rooms of the hideout (again, they avoided the front door in). They purposely avoided any quests that took them far from town. Given that they ended up going through about 17 pages of the adventure portion of the module out of 36, I would suspect that one more 8 hour session (or maybe a bit more) and they would have finished most of it.
Out of the 6 players, only one (my wife) did not want to play 5E after playing that one session of the Starter Set. She is not a big FRPG fan and does it for the social aspect (and to do things with the family). Even so, she ended up creating a halfling bard (before anyone else did, and she almost always plays a human paladin, so this is a big divergence for her). Another player wants some type of arcane caster (sorcerer, warlock, or wizard), another wants a cleric (having played the cleric in the starter set, she seems interested in them now), another a gnome ranger, and one wants a fighter/rogue. We have one player remaining who has not yet decided.
I find the fact that one player wants a halfling and another a gnome very interesting (and 4 players still have yet to pick race). I cannot remember the last player in one of our groups who took a halfling or a gnome in practically forever.
I think that the Starter Set was very influential in getting our group to transition over to 5E, and it also seems to be a bit influential in getting some of the players to play outside their normal comfort zone of PC type.