This was the cause of an Enormo Row with my mum.
In a nutshell:
baby was born at 35 weeks. She was very sicky, tried infant gaviscon, comfort milk and then had miraculous results with Aptamil Reflux and Regurgitation formula. Brilliant!
The baby is, what I would call, a gorgeous, thriving, chubby legged 5 month old baby. At HV clinics she has been weighed at 95th centile, so within a normal population range, statistically.
She has 5 x 7oz feeds a day and no longer feeds in the night. She sleeps from 7pm ish to 8am ish.
My mum thinks she comfort feeds to soothe acid reflux pain after 2.5- 3 hours and that we should make her wait longer in between feeds. This absolutely breaks my heart. 
So any advice please?