These shops have some old threads about them.
Milton is all French and legit, but they sometimes tease just to get you wondering and Gabba just offer really cheap massage. Cute girls tho. Heard an old guy getting a duo at gabba once. Girls sounded very flirty and he asked to add on 15mins and they didn't seem to catch on.
Holland park is opp a cop shop, you've got some heavy, full balls to be trying there. Also didn't like the vibe of the mls there.
I've been a happy camper elsewhere, but have a feeling it's only for a selected few and she went back to Korea a few months back. She did great massage too.