I picked up a couple Eheims in my first few trades and started using them, I liked them, virtually silent and appear to do a good job. I continued to collect them and am currently running 5 of them, 3- Pro II 2028's a 2222 and a 2227 and have not had a moments trouble (knock on wood) I also had a 2213 Clasic and it was wasnt all that, but still a good filter, the hose fitting would leak after you took them apart.
They are too expensive to by new, but thats comming from a junk collector