I've used a fibre backhaul WISP (fixed wireless) service for 2 years now. The backhaul is critical, my ISP uses Easynet and it's more reliable than BT wholesale on my other FTTC connection - with 1 brief 10m early morning outage in the last couple of months.
My service is advertised at 25Mbps shared both ways, in practice I get up to 12 down and about half that upload, and it's fairly consistent with no noticeable peak slowdown. The latest MiMo technology is very reliable, and no slowdowns due to weather or interference. I'm about 5 miles from the transmitter (of course line of sight is the key factor) though some customers are double that or more. (It can run up to double that speed, but this is the basic cost service). Usually there's an install cost comparable with a TV aerial (though small receiver about half the size of A4 sheet of paper can usually be attached to an existing pole), and service cost is about £13pm in my area. Pings can vary a bit from 15 comparable with the FTTC service up to 60+ or so - but that's better than I ever got with a mass market ISP on ADSL at 3.4km from the exchange, and throughput speeds are x3 at least.
It needs a cable (not ADSL) router unless you connect direct by ethernet cable from the supplied modem to a single PC.
EDIT: this is the equipment I have for instance (though the installer will supply as they need to configure for your service)
http://www.msdist.co.uk/product_NanostationM5%20.php . It reputed that torrential rain can be an issue for any wireless signal, but I've never noticed a problem in the east (and fog and last years snow no problem), and the internet keeps its signal even when the Sky dish temporarily loses its signal in poor weather.
Edited by deleted (Mon 28-Nov-11 14:02:28)