Has anyone used the Sneak Peek gender blood test here?

B

I'm 4 weeks tomorrow and considering buying the testing kit for when I'm 6weeks but it's quite expensive!! I managed to get £10 off, so it'd be £79 instead of £89.

With my first I booked an early gender scan beacause I was desperate to know. Obviously that can't be done until 15/16 weeks so it'd be an extra couple months of not knowing, plus it's not much cheaper!

Thoughts?