I haven't had issues with time. I don't go back and change answers. If I mark an answer, it stays. I will flag questions I'm not sure about (without marking an answer) and go back to those. I do this because more often than not, I have the right answer to begin with and change it to a wrong one. So I stopped doing that and trust my gut. I had a few that took me 3-5 minutes, but the average was less than a minute. I got to the written part with about 1:15 left. I finished with 25 minutes remaining.
By manageable, I mean I nailed one and am 80% confident on another (I BLANKED on part of it… talk about bad timing). The third I BS'd, but it was odd and vague so I assume it was a sample question.