I have to admit that I quite like the Collection 2000 polishes. When there are offers on they can be worth picking up I think. The full price is a bit much in my opinion, as the bottles are quite small, but the quality is really pretty decent, and the colours usually fun.
Siren caught my eye as it’s super bright, and that is a good thing in my book :) It applied easily, even though the brush is like a mini-me pro wide (i.e. too big).