Ive owned 2 BM's and have never had a problem in 6 months. I had the NAC7 which had the atman pump which did a great job and now I run the 180CS with the aquabee pump which is a workhorse. So far so good! some BM's come with ehiem pump which are also known to be reliable and efficent. IMO most of the BM pumps are better than the sedra pumps on most euroreef's. Either way you cant really go wrong
Cheers
Ray