I never, ever thought I would take part in group therapy. Then again, I never, ever thought I would take part in therapy at all!
I have now completed 2 3-week in-patient hospital stays and have been attending a day programme twice weekly, off and on, for several months now. All in all I have found group therapy to be an experience that takes a while to get used to and a darn sight longer to become any help or benefit, but if you stick with it, are truly dedicated and are lucky enough to have a good and stable facilitator and a relatively committed core group of attendees, it can actually be a very very rewarding supplement to individual therapy.
And yes, for me, group therapy could only ever be a supplement and not a substitute, but a good supplement nonetheless.
The thing about it is that there are many variables which impact on its safety, utility and effectiveness. The participants and their level of respect, social skills, self awareness, commitment and compassion for each other is a critical and very fluid dynamic. Perhaps even more important is the facilitator. Group dynamics, particularly with groups of often unstable people, are very very difficult to manage. A good facilitator can make it - a bad one can break it. And not all therapists can transfer their individual therapeutic skills to a group context - managing a group is a very different skill set.
I say all that to say that I, overall, and with several rocky exceptions, have had a positive group therapy experience. But I have no trouble understanding or accepting how some people don't.
Maddog