A few providers offer contracts with guarantee periods allowing users to find the service isn't suitable for them to leave without penalty for what would otherwise be a contractual service, but O2 Broadband has launched a service with a 100-day guarantee, though you will need to sign-up by the end of January 2008 to take advantage of this offer.
Most of the details of the packages have been covered previously, but here's a round-up of the announced packages:
The Standard service at up to 8Mbps service will be £7.50 a month whilst the Premium package offers connection speeds of up to 16Mbps at monthly cost of £10. The Ultimate package with speeds up to 20Mbps costs £15. Ultimate also offers 1.6Mbps upstream speeds compared to 1.3Mbps on the other products. These prices assume that you have an O2 mobile contract. Those without one can purchase the services at an additional £10 per month.
A number of other exceptional charges can apply if you move house or have your account suspended and need re-connection. One particular one worth noting is the £50 early cancellation charge which applies if you wish to terminate the contract within the first 12 months (but after the 100 day guarantee period).
It is worth noting that whilst this guarantee is welcome, there are many services out there which only operate a month-by-month contract, however they can still include termination charges so this deal is worth considering.