ICO assessments only give me valuable reference before deciding. I believe in more research, reasoning and decisions of myself.
Their reference including the reviews aswell and giving a score rating based on various reasons whether it's objective or subjective but just not quite reliable.
As you said, it's better to make an observation based on our own rather than relying to stranger.
In any case, the analysis of ico companies requires not only more time, but also a lot of effort, and you need to use large amounts of data. The analysis consists not only in the study of technical documentation, but also in the verification of each member of the project team. If a person does not possess certain experience for this, then in any case he will rely on the results of research of other people or on information of rating resources.