Just think about this. If someone does a job well, everyone wants to go there, if someone else doesnt, then there not going to have a huge line-up of customers
Personally I'd rather take it to neither. Would like if I knew someone who worked at a mechanics shop with the alignment tools to do it. But I dont know of anyone.
Not trying to detur you from Meng's, but just saying that something that seems like a good thing can turn out to be a bad thing
I went to pedders last time, and it seems to have helped my tyre wear so cant complain to much. However I dont think they took any camber out of the rear.