First off these are Killer Impressions Onza, and several months ago I purchased a pair of these as a result. I did not experience a wow factor and as a matter of fact it actually took me a week before I decided, man I'm starting to like these. They are VERY revealing, in a sneaky kind of way. (not in your face) in some ways they are as revealing (in some cases more) than my 535's. TIPS and patience are extremely important as stated above. Very tip dependent but these are so darn comfortable.
Thanks, these are indeed great phones and are still my favourite BA universal. I think a lot of people look past them as there are newer IEMs which invariably take the lime light such as the W4 (which admittedly I'm yet to try). Glad you're enjoying them!