I used infacol for a couple days and it worked really well for getting big burps.
I haven't used it though since Jasper's sleep apnea episode... its absolutely crazy over protective nervous mummy but I've basically cut out anything that was new into his system around that time and as I'd started him on infacol only a couple of days before the episode and its not really recommended for new borns, so I'll give it a break until he's a bit bigger.
I'm sure it had nothing to do with his sleep apnea, but I cant get around being paranoid - I'll probabloy go back to using it once I've calmed down a little... give me a week and I'm sure I'll relax!