I went twice to the seminars... and i can tell you that try to get people with you, but they need to be agile because they wait everyone, and if you have bad luck and be with kind of clumsy people you are not going to take advantage of the seminar...
and i recommend you to get people because they only attend 4 or 5 people i think... and if everyone are agile, you can go faster and ask them for all your concerns and other techniques...
pd. here in méxico, the seminar costs like 130 dlls...