Sorry to sound like a parrot, but it's really a personal choice and depends on what you feel comfortable with!

I just had DH, and he was the best support person I could have asked for - I apparently didn' t even let him get as far as the toilet once we were in hospital. I also had a very supportive mw (we did group practice, so you have the same mw for all your appts and the birth, which meant we had a good relationship).
I know a few of Mum's work collegues thought it was odd that she wasn't going to be there, but tbh, neither her nor myself thought about it - we both figured it was an experience for hubby and me.