Just reading through this as I'm about to start colief after trying so many other options!
As mentioned above its the first thing you find if you google, so I thought I'd add my colic experience in case anyone finds it useful...
My DD is now 9 weeks and has suffered really badly from wind since week 3. She screams from between 4-6pm until 11pm every night, so I always laugh at the 3,3,3 rule as it seems to me that colicy babies have it all the time! I've tried the following;
Infacol - started week 4, worked from week 5, by week 6 she had reflux symptoms and her movements had become less often, more explosive and were starting to cause more wind issues!
Baby gaviscon - prescribed for reflux symptoms, stopped the crying at the breast and stopped the sickness that had appeared from week 6. Caused real constipation - ie. solid rabbit type poo and clearly lots of horrible pain due to the constipation.
Cranial osteopath - relaxed DD but no change to colic symptoms, her regular jumping diaphragm or hiccups
Colic baby massage - gets some massive farts out which provide immediate relief but she's not massively keen on me doing it!
Cutting dairy from my diet - no change even after 2/3 weeks!
Stopping both infacol & gaviscon at 7 weeks - much happier baby, no reflux signs at all, back to the wind & griping pain but movements now normal again, so it feels more manageable.
Gripe water - first attempt at 4 weeks resulted in projectile vomit, small 1ml doses do bring relief when she's really screaming but no real fix.
Now on to colief!