Anton - I agree 100% - I had an Exceller, and experienced big problems with it - (somewhere on Sealine there is a thread about my reel with pics - but I cant seem to find it) - Maybe the moderate can assist in finding that thread
The reel did not lay the line on the spool evenly (It did it in an hour glass shape) - when casting, the line came off in a bunch - so I spent a lot of time taking out the mess. Everything was tried , like adding washers like one does with Shimano.
I took it back to where i bought it - and they said that there was nothing wrong with it. Eventually they gave me my money back after I was insistent that nothing that they could do with the reel would change its operation. It may have been that specific reel, who knows.
Since then I have bought 3 Shimanos (stradic 2500 and 4000, and a Sustain 5000). I jhave never had a bunch up once on these reels in the two years that I have had them. No problems at all in any respects.
I think that their drag is far better than the Diawa - and their general action as well. I also noticed that the oscillation is far superior - I have Jigman braid with a duifferent colour every 10 meters - you can see the consistent pattern that the braid creates when it is laid down - the Exceller did not do the same at all
Apart from rinsing in fresh water after each outing and very occasionally putting a few drops of oil in the service port - I have had ti do no maintenance at all - and the reels still look new.
In my experience - I would not buy a Diawa reel