hi, we did easy from about 3 months, and i saw improvements within days... but then i only have one to contend with! i still have ups and downs, but generally i've found it amazing. and this board too.
re hiccups - he STILL gets them often. i used to let him suckle to rid them. but now after knowing what i know, i'm sure i overfed him! they don't bother them at all. but, yep, did keep him awake.