Txl is a really nice airport to use but
nowhere near as great as THF was. I used to fly SN for the sole purpose of landing/taking off from there rather than txl and it was always very much worth it.
As a Berlin regular, i miss thf a lot, and will miss txl (less) when it finally closes.
My one difference of appreciation with cws is that id never be caught heading to zoo banhof though!

there are other parts of the city I much prefer.