I have been using a 2028 for about six or seven years now and I have never had a problem with it. It is by far the most reliable filter that I have ever owned. I have two xp3's that I have to clean out almost monthly due to them losing output strength. The 2028 I clean out about every six months. I have never had to replace anything on it. I do have an extra seal just in case but so far I haven't needed to take it out of the package.
There may be bigger filters out there but in my mind none of them beat the reliability of an eheim.
There may be bigger filters out there but in my mind none of them beat the reliability of an eheim.