I have been to many and also give quite a few as a business coach.They can be very good it depends if the they can start on a level for you to grasp.But any thing you take away will help. The problem that most have is applying what they teach as the business courses are not specific to our business.You just need to attend a few and see what can you use in your business.They will never be bad for you.I see the need on this forum so often by what guys say.Good luck.