The HYDRA-WEAR COMFORT SERUM by oera has received positive reviews regarding its effects on skin. One reviewer mentioned that apart from the price, they didn't find any major drawbacks, but it might cause some irritation for those with super sensitive skin. However, the reviewer was able to use it without any issues.

Another reviewer with combination dehydrated sensitive skin did not report any redness or breakouts, and they have not noticed any drawbacks yet.

Based on the provided reviews, it seems that the serum is generally well-tolerated, but individual experiences may vary, especially for those with very sensitive skin.