I love mine to peices, ive had it 3 years and never had to replace the seals it did leak a little but i took the seals out cleaned them up and boshed them back in. since then ive never had a problem.
It leaks tiny tiny amounts so it needs to be re bled every 6 months or so witch is normal id of thought.
I can never see myself using another lever unless i kill this one, witch if it does happen it will be a very very sad day for me as i really love mine.