Ds1 and Ds2 both had colic and relux!
Ds2 he was easier, colic cleared up much sooner and reflux isnt as bad, but still alot but nothing in comparison to his brother!!
Ds1, well... about 4 hrs screaming every night (plus crying after every feed with wind,) plus the hideous, hideous reflux. It made him lose weight, he was put on prescription milk, really bad projectile vomit etc it was awful, but infacol definitely did help, then later we had donperidone and ranitadine (sorry camt spell them,) and that helped too- but he was so bad that they suggested weaning him early and that helped, he still is a bit refluxy but only a tiny bit.
We used dentinox with ds2 and that was actually quite good to and a little cheaper than colic but harder to come by, infacol never seemed to work as well with him, he is still on milk full time so still has reflux and we did have infant gaviscon, which did fuck all as it did for both boys, butit seems to be settling now, I think.
Both boys hated laying on their backs and we keep ds2 and kept ds1 for 20 mins max after burping from feed because of extra wind and reflux.
Anyway, it varies baby to baby and everyone responds differently to different things, whatever works for you as a family.