Just migrated from Tiscali today using a MAC, everything went well and was on perfect time. Download speeds seem great so far.

Make sure you read the Terms and Conditions before you buy. It stipulates that you can only access thier DSL service using the free router they provide, which is a modified Netgear D834GT. Your login credentials are hard-coded into the router and you will not get a copy of them. There is no way to update the firmware and you cannot extract your own credentials from it using telnet or any other sneaky methods. Sky also reserve the right to kick you if you are connected using equipment other than that they supplied!