I currently have unlimited BT broadband and basic sky package. Both of which are out of contract. I live in the rural part of RG7 area where my EE mobile doesn't get signal. Would NOW broadband be of any advantage to me?
Welcome to the forum. NOW TV broadband uses your BT line so you are likely to get similar speeds to what you are currently (dependant on which package you choose) so the only real difference is down to price and any call feature you need. If you enter your details into https://www.nowtv.com/broadband they should give you your estimated speed.
NOW TV also offer TV passes for entertainment, cinema, sports and kids channels which some people use as an alternative to a Sky package but you don't need to be a NOW TV broadband customer to use these as long as you have a compatible device (Sky boxes can't be used) and a fast enough broadband ' (NOW TV recommend a minimum 2.5Mbps, although I'd add a bit more onto that).
These help pages might give you a better idea how it all works