I havent got a PK yet, but I've only heard good things about them.

I do have a mocker and I just love it, and even with the snaps its pretty adjustable as to size. Right now I am in my size 42 workmans which still fits even though I am actually wearing a size 38 kilt now.

If you do decide to get the PK, and you really like the look of the UK snaps on the front its a piece of cake to add them yourself. They dont even have to be functional, you can just add the top part and ignore the bottom piece of the snap.

Thats actually what I plan on doing with mine, since I like the look it gives the apron without having to wear a sporran.