Well milkshape has a more simple user interface and is much easier to get used to, and it also has a built in dts exporter. On the other hand, blender is free, open source, and has lots more features. It has quite an overwhelming interface at first, but there are many tutorials covering it all. You only need to use like 10% of blender's features for blockland anyway. I haven't even mentioned the fact that blender allows you to use quads, which can half the poly count on your model, which can be crucial for stopping fps drops on high poly models.