Never realized my IE8's were under-performing until I got the re272's. I got the IE8's for 170$ for which I can't complain; but I got the re272's for 160$ and they're just leagues ahead. Was not expecting that.
Also took the time to open some IE80's in the store I work at, burned them in over three weeks and played around with them along the way; slight improvement over the IE8's, but still, not even close to the performance of the re272.
Not to say the IE8(0)'s are disappointing, but they're underwhelming compared to many small competitors.
Have also had experience with the gr07 and dba mkII recently which are still better overall; but still not quite as good as the hifiman flagship to my ears.
And lastly, it's hard to be impressed with IEM's when you're used to high end rigs with real cans!