Not had any experience of Autocom, although I have been told they are very good.
I bought a couple of sets of the intaride units for a trip with another biker-couple friends of mine for a tour of the lake district earlier this year.
I went to the intaride office to purchase them after seeing the advert on the
site. The guy there was very obliging and willing to do a deal for multiple purchases and cash too so saved some money. They were easy to set up and can be taken in and out of the helmet easily. The quality was good for what we wanted which was 4 way communication between 2 bikes. Range was about 1/2 mile and good for about 80mph. wind noise with my helmet was a small problem but my mates helmet had an internal chin guard and that seemed to make a difference.
They are also very good to be used as standard walkie-talkies with god knows how many channels and sub channels. Batteries lasted well and there are various add-ons available now that I haven't tried.