I get mine at specsavers and havent had an issues, but they arent bifocals.
Mum took her glasses there, and they looked at them and said they couldnt do the same, and recommended her not to buy theirs, becuase the lenses she had were differnt, and a more precise? not that theirs are bad quality, but they told her that becuase her eyse are used to that type of lens, the ones they had wouldnt cut the mustard.

So it will depend onthe lenses that your DD, or rather her eyes, are used to and whether the specsavers pentax lenses stack up against them