I really liked the BTS features they have here. Includes 4 good network sites too, which was a nice bonus I wasn't expecting.
Yes with the network sites included it's a pretty good deal, as Sweetheart itself has a great back catalogue and in fact all the sites in the package have a lot of content. However, something to look out for is that the basic subscription options you see are for streaming videos only and if you want to download them you'll need to pay extra, which the site doesn't make clear.