First purchase of these filters so I can only say that they seem fine - no better/worse than others I've used. They are however less expensive which is definitely a plus.
I haven't had the chance to use them for any length of time yet. They did arrive real fast and the quality looks very good they fit the opening in my furnace. I am anxious to see how they preform when the air conditioning starts. Ask me in July about your filters then. Until then Have a Great day.