After reading your post I decided to check that case out. I've had a few Spigen cases across my last phones and in fact I'm using a Slim Armor Silver right now.
I bought the Ultra Hybrid Crystal Clear from Spigen through Amazon for £3.99 with free delivery. Glad I forgot to order it yesterday as it was £6.99 then! Hopefully it's a good case as you say and I got a good deal. 😉