I've been a few times. It's not the type of thing where people mingle and meet new mums in my opinion. Everyone comes with there own friend groups. It's just like going to a cafe any other time really except you get a free slice of cake with a hot drink lol. Also gets very busy at the M&S on junction 7. If you go quite early it's fine but it's hard to get a table later on x
I tried to go one time and it was manic in there, and couldn’t work out if there was a parents bit so turned around and left