EDIT: Restringed my guitar yesterday, the 8th string is already completely dead and dull. Other strings are a bit better, but that's not a sound you'd be expecting from the fresh strings. It seems it's a bit of a lottery with these.
When fresh these strings sound amazing - very bright and punchy with lots of overtones. Unfortunately, I'm still looking for strings that would stay fresh for a longer time, if that's even possible.
I play using a lot of modern techniques such as tapping, selective picking and thumping and after a few weeks these strings lose brightness and punchiness necessary for those techniques. The good thing is they are cheap, so I'm buying 5 sets hoping they will last me for a year.