What really bothers me about Kummer-finanz / kummer-finanz.com is the disconnect between their marketing and reality. They position themselves as a premium service but deliver a below-average experience. Found them after my brother mentioned them and I fell for the polished exterior. Never again.
Pros: Transparent fees|Educational resources|Comprehensive tools|Automated trading options
Cons: Desktop app not available on Linux|Charting tools need more indicators