Wanted Polar Pro filters in Dec. Not available at PP so ordered on Jan 1 at Amazon. $79 for 6 pk cinema series. No delivery. No delivery. No delivery. After several phone calls still no word on when order available. Finally irritated and canceled order March 23. Then went to Amazon Prime again that day where they garenteeded delivery in 2 days for $100. Ordered March 23 and received old style out of date filters March 24. Really pissed off at Amazon. Don't order there!!!!