Just to clarify a few bits of incorrect information in this thread:
1. The cost of the 1Gbps service is £50 per month when taken with a VOIP phone line at a cost of £12.50 per month. This includes evening and weekend landline calls and is cheaper than the BT equivalent that you would need to take to get Infinity. It's only £60 if you take the broadband-only service. So for the extra £2.50 to get the phone service it's a no-brainer to take the telephone service rather than paying £15+ per month to BT or whoever else on top for a phone line.
2. There is no free trial that I'm aware of. When I mentioned the offers (differs by building), these are on signing up to a 12 month contract to begin with, i.e if it's 3 or 6 months free, then you will get zero rated bills for those number of months then pay full price for the remaining months of your contract. It's not a free trial period, i.e you can't just cancel within the 'free' months of service.
3. Hyperoptic allows you to upgrade the speed of your service at any time (i.e start on the 100Mbps service and upgrade to the 1Gbps service), but this will reset the 12 month minimum term from the date of the upgrade. You cannot downgrade the service level within the contract term as far as I am aware.
I hope the above helps clarify a few things.
As for how long it took to install, I'm afraid I don't know as the building I'm renting in had Hyperoptic already installed in all the flats, i.e the faceplate was already there. I just picked up a router from the concierge desk, went upstairs, plugged in the router and called Hyperoptic to enable the service. I was up and running within 20 minutes of collecting the router.
P.S - I don't work for Hyperoptic, I'm just very happy with the service so far (since August). I have seen download speeds as high as 85MB/s (680Mbps) on larger Steam downloads (Saints Row IV weighed in at around 23GB).