Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Almost but not quite the same as the original adapter
Review: The adapter works great but I had to make a modification to keep the adapter inserted into the printer. It previously kept falling out because the diameter of the adapter end is smaller than the original adapter. So even though it says equivalent, I would say almost, but it's not quite the same as the original adapter.
