Given the option, I'd have given this 4.5 stars as I'm a tough marker (5 stars only for the very best e.g. "Hope" by Hillsong) but this is a very good contemporary worship album.
Much like last years' 'Mighty to Save' it's more guitar-pop with a strong worship theme. 'Saviour King' is perhaps more polished with stronger songs than it's predecessor - if you like what Hillsong do, you won't be disappointed. Hillsong live albums from a few years back were getting a bit 'same-y' in places with too many slow songs and repetition of choruses - but there's none of that here. The good songs just keep coming, the tempo's (relatively!) upbeat - and that's how I like it!
For me, Hillsong lead the rest of the pack when it comes to contemporary worship. If you like popular music and worshipping God from the comfort of your living room, you should buy this!