I just got one off ebay 3 days ago, well it was delivered 3 days ago.
Took it apart and cleaned it and media. Filled with water and hook hoses up.
It was very loud. I thought it was air stuck inside of it so i let it run for about 2 hrs.
One of my freinds came over to check it out (he has a fluval 405). We inspected everthing. Couldnt come up with nothing. He left and i gave up for a little bit, searched all over the net for a answer. Couldnt find anything.
Well about 1 hr passed and I went back to the filter. Took it all apart, had a 5 gallon bucket beside me put all the media baskets in it. Started thinking what could be making this noise? Took impeller out, there is a piece of plastic you have to rotate to take it out. looked at the bottom of this peice and there was a little circle groove pattern wore very lightly in it. Looked down were the impeller goes into the motor and there was a little white washer in there on a soft piece of rubber that the shaft goes into. Took this washer and put it on the other end of the impeller and put it back together. BAM works like a charm.
There is a quality check sticker on the bottom of my filter. There is no way this filter went through a quality check, if it did this should have been caught. It was 10 times louder than it is now, with the washer in the wrong place.
So there you have it. All the problems I have had so far and I have only had this thing for less than a week.
Now the choice is up to you.
Here is a link nice review
http://www.plantedtank.net/forums/equipment/12028-equipment-review-jebo-828-canister-filter.html?highlight=cfs4