With my Daughter I used Sma at first. It made her very sick and gave her bad colic but she was fine soon as I changed to Aptamil. This time around I will stick with Aptamil.
I've not heard it about cow and gate, my first was bf form6 weeks then on cow and gate and my second was bf for 10 months then cow and gate for two months til she was a year. Neither of them had any problems with it x