Thanks for the input both. Been playing guitar for around 10 years I guess. Admittedly the vox are fairly rushed, I only did a single take on them as I was bit pressed for time. Also, I'm not a great singer, but having said that, I'm sure that there are parts that I could improve.
Aside from the performance, how was the mix? I find it very hard to get vocals to sit well in a mix as I can't always great a great take from source (I'm using a wardrobe and duvets as a vocal booth!).