Recommended: Passed all key safety and durability tests. It may have very minor failures such as of labelling requirements.
Worth considering: Passed major safety and durability tests, but has some minor failures, such as potential finger entrapment hazards.
Not recommended: Failed at least one major safety or durability test. Major failures include strangulation hazards from the harness, head entrapment and tendency to tip over. These models may be OK when used carefully as per instructions – some hazards arise only from misuse, which you could easily avoid. However, the recommended and 'worth considering' models show that strollers can be made without these failures.