Yeah Bill, i would agree with Dreamlander. The service and performance is top notch. I've had the 8mb (5 pounds sterling a month) for a little over a year now, and have not had one single problem to date. No dropped connections or no problems getting online. I too have experienced stable speeds and no drop in performance when multiple users are online. The wireless router that Sky provide is also top notch (imo), pushes out a strong signal to all regions of the premises (can even get 'very good' signal strength in the loft, which i think is good considering that the router is downstairs in the kitchen).
In the aim of making this as balanced as possible i must state that i was previously a subscriber to the Sky 4mb (free option) for a little over 4 months. I decided to upgrade to the 8mb option to try and take full advantage of the areas reported quick speeds (and also to increase my download allowance). No problem with the download allowance, but the network speed did not noticeably change (which was verified by an online line test). I understand that network speeds are often advertised as 'up to' (so it is not an absolute promise), and are also dependent on a number of factors (quality of BT line, distance from the hub, number of people also online on your road and a few other factors). So i fully understand that the line speeds were never guaranteed to increase. In essence, I am paying 5 pounds sterling for a bigger download allowance, which i do not mind so much, as the level of performance is excellent.
If i were to offer you any advice, then i would get your line tested to see what speeds you can realistically expect, as there is no point signing up for the 16mb option if your line can only facilitate 2mb (for example). The other factor to consider, would be your estimated download usage. Before signing up I was told by Sky that if you go over your monthly allowance, you will receive two written warnings. However, if you go over a third time, then the line may be cut off and the contract terminated. Whether or not this is just scare tactics to keep usage conservative, i do not know. This may be worth checking before u decide to join (if you do that is).
5/5 for me. No problems at all. Pleasure to use. Hope this has helped you in some way.