Pros: Brutally honest and comfortable
Cons: Brutally honest; you may not like some of your favs anymore
Great reference-quality open-back-headphones, big sound stage, accurate reproduction, detailed.
If you have a great recording, you will hear detail you may not have heard before. My digitally recorded version of 4 Seasons, done in a good sound room, it excellent, you are there.
If you have a poor recording, you'll know it.
As to the base issue, my pre-amps have built in equalizers and my equalizers have equalizers so its not a show stopper for me. If you crank up the bass, these will bump with the rest of them.