Because no one shared their experiences, I have now tried it myself. I especially like the automatic linking between deposit and withdrawal as well as the recognition of hardforks etc.
Also my tax consultant recommended it because he thinks it is important that the tax logic is certified by an experienced company (KPMG).
This still isn't enough. I would much rather hire a CPA to handle this issue, instead of putting it through a computer program and praying that everything worked out correctly.
Hire a professional CPA who knows (or is familiar) with cryptocurrencies and the laws surrounding the capital gains around them. Don't use a computer program because it's much cheaper.