It is absolutely fine, IMO, to share the real user experiences both pluses and minuses. It helps the potential buyers and critically helps manufacturers to continuously improve their products, services and their QC. But, ensure you let ACS know.
This forum is great and open to receive the views as they are and has no commercial intent. Considering it is a public forum, we are going to see diverging opinions, but we all learn to respect each other as a person. Just be careful with what we post and the choice of words.