It's not until you go back that you realise how much of a difference this makes - The 2D trees look comparatively awful in place of this mod.
But I did go back, ultimately. The quantity of trees is huge and I think some license could be used to reduce the number a bit, but also I think there could do with being some variation in colour in the trees, as they all seem to be the EXACT same colour, which is slightly offputting.
I give this mod four stars because I can appreciate the tonnes of hard work put in to make this mod, and it does look much better, but I think it could do with some more.