Here is a sampling of what they had to say:
Benedict Nightingale of The London Times: "Schwimmer, Ross in Friends, has successfully made the transition to the stage, giving us an earnest, anxious figure who sometimes seems less like a man than a dog eager to be told he's a good boy… Powell's wonderfully giving and forgiving smiles momentarily freeze. Burrows gets very angry indeed. And Manville goes further, venomously devising a revenge that scares and humiliates Schwimmer's nice-seeming but deeply slippery Man. That's a bit implausible, but adds bite to an evening which, while never bland, could sometimes be tenser. Yet there's plenty of subtle, telling, funny writing in a play which is far more than an excuse for a TV star to parade his skills in London."
Nicholas de Jongh of The Evening Standard: "Some Girls, despite plot contrivances and the relative similarity of the women's resentments, offers LaBute's sardonic and amusing view of the difference between the two genders: the concern with which the women regard their sexual relationships is reserved by men, or Schwimmer's Man, to regard himself… Schwimmer's nerdy, wimpish persona, his bashful, tentative air, as if he suffered from masculine deficiency syndrome and his self esteem count had fallen to high anxiety level, nicely suits his character."
Paul Taylor of The Independent: "Throughout Schwimmer remains bland, competent, and boyish--though not fatally boyish in the manner that appears to have turned these women on. He fails to convince you that our hero has the chip of ice in the heart that gives writers the ruthlessness needed to turn relationships into 'material.' This love rat would much rather be stroked than bite."