Even though it doesn't say to do so in the pattern, I could have done with going down a hook size as the square is a little bit larger than my other ones.
Apart from that, there were no major issues with the stitches and - round of applause please - I cracked my first sub-2 hour block (not counting my granny square at the beginning; I've had a great deal of practice with them over these past few months).
Degree of difficulty: Easy
Time taken: 1.5 hours
Result: I'm 50/50 on this one.