[hannob]

The bigger issue is that votes from governing parties and opposition parties are very different things and deinwal.de kinda mixes those together.

As an opposition party you can basically vote what you like, you don't have to consider the consequences (because you often know it won't pass) and you don't have to compromise with a coalition partner.

Having said that: I'm generally not a fan of these tools, precisely because of those issues. Wahl-o-mat has the issue raised by the original poster, i.e. they look at what people announce, not what they do, but the alternative isn't much better, as it's comparing apples and oranges.