I've been using Sadowsky Black Label (both steel and nickel), but this is the first time buying the nickel strings from Thomann, and I finally get to leave a review.
They are some of the best strings I've ever used, and I'll continue to use them for a long time. They're bright, warm, punchy, and the black binding at the top just look damn cool. The tapered B string is PERFECT for my Warwick Corvette as the B string saddle isn't too wide. Simply put, the best B string in the market.
The tension is very good. Definitely tighter than Ernie Ball, in my opinion. I find higher tension very useful for fast finger plucking. The notes can be shifted and played very precisely.
I can't really find any cons with this product. Every bass player needs to use Sadowsky Black Label, regardless of their genre.