Have been using this since October 2008, thanks to my sister (contract in her name, at her address, for reasons unimportant at present). Costs 7.50/month for 5 GB (there was a deal on in September, so sister signed up but lives xxx miles away and sent the dongle on).
It is in use pretty much 24x7 (usage limit is 5 GB and I get to 95% or more by end of month). Running iMac, linux and a trio of Win XP machines (sharing the USB of one XP box with ICS). The 3Connect software sometimes reports no network (while a connection is present) and in a few cases, only recently, I have seen no connection light while Windows thinks it is still connected. Overall not a problem - I use the My3 page to check usage every 8-12 hours to ensure I never go over limit
Draconian fees if you exceed limit - the T-mobile system of lower speed but no extra fee seems a lot better, though this is an 18 month contract so not likely to check that out.
In a semi-rural part of N Wales (10 miles south of Chester) and seems I am lucky as there's a dual carriageway nearby and cannot think of any lengthy periods without connection being possible (I do switch off now and then, but not often, as I do websites from home, and check several mail accounts regularly).
I have never needed to contact customer services or support. The 3 days for testing is definitely too little - in my case I had no connection for a few hours on second day - 7 or 10 days would be more fair for users. Have put 5s for service and support as cannot claim poor or excellent.
Previously have used ADSL on landline since 2001, and previously had 6.5 Mbps. Speed could be better -- 3G 1 or 2 bars (of 10) but can show 2 bars and HSDPA (?) or no bars and I am still online.... so do not use that as guide now! Normally have no problems with BBC radio listen again - not expecting to view video with it, so not tried.
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