T.T.
Depends on the person giving the party (the rep).
I've been to many of these parties (i will not even comment of the friends I have) and in my younger days, helped a friend of mine host a few and it's really all in who is your rep.
If your rep is new and has little to say, it's not much fun. But if you're rep is sassy and fun and keeps things interesting...then it's a good time had by all.
Most of the products are the same in either.
My suggestion is if you have reps in mind...go to one of their parties (yes, it's ok to ask if you can see one to see how they are around people) and make up your mind then.
Also...it's better to have the parties on the weekend. NORMALLY, libations are served and frankly I don't want to go to work with a headache. I personally would NOT go to one that was held on a week night.
Good luck to you...and HAVE FUN!!!