Call depends on the setting...
The ones I am familiar with allow the fellows to take the calls and are available if the fellows/residents have a question. They divide up the duties amongst the members of the team.
The work hours are not pleasant. Often the cases go over the requested time and can range from 3-10 hours. OR schedule can be heavy, whereas the office setting is more flexible and benign.
The malpractice, yet again is setting dependent however the relative absence of Obstetrics does matter.
Its a great subspecialty for people that love surgery, especially technical aspects. It is 3 years in lenght following the OB-GYN residency so it does require a great sense of commitment. In general, out of the people I know, it has been mostly males that have gone into this subspeciality whereas the females have been more attracted to Urogyn as a subspecialty.