Hi.
Yeah, Formentera Is fantastic. I love Ibiza, but Formentera for me makes me feel like im actually on holiday as it not commercialised! Lovely beach there, very carribeanesque!
I havent used the boats from Ibiza Town, but have travelled there twice from San An. Both took around 2 hours to get there. I have heard the Ibiza town ones take around 30mins...but not definatly sure.
The first time was on a smaller boat, and it did get a little rough, and there wasnt much shade. However the second time i went, last year, the boat was a bit bigger catermaran, more sturdy and also had a glass bottom, as well as well shaded. Im sure it depends on which boat excursion booth you goto.
The first time i went from san an it took us to the Formentera port, which from there you need either a moped or pick up a coach to get to the main beach.
However the second time i went, it took us straight to the rocks in front of the beech. It was a little tricky to get to the beach as you have to navigate yourself over some rocks and wade through water with your stuff to get over to the beach, but part of the adventure i suppose.
This was better than getting the coach as you had more time to spend there.
Im off there probably next week, so enjoy yourself, im sure i will!