I have heard the 901s, and am quite impressed with the experience.
I am fully aware of the negativity surrounding Bose products, but it certainly not applicable to the 901s, if applicable at all.
For a little perspective, I have auditioned speakers that have been quite favorably reviewed and have been let down, and I have auditioned speakers that have been unfavorably reviewed, and have been let down by the review.
Case in point, Polk RTA-11T. Reviewed by Stereophile and not a glowing review at all.
On audition, these Polks simply deserve more than the reviewer gave them. I still have my used pair, now for more than 10 years.
Now back to the 901s.
They are really great speakers.
Bass extension is fine, mids sweet and highs are extended and defined. The myth about bass lacking in Bose products is soundly trumped by the 901s.
Additionally, these speakers excel in the soundstage department. It is simply wide beyond expectation. And you have the added benefit of enjoying the sweet spot from a greater number of "spots".
The looks also appeal to me, as I am a fan of Eames era design, and with that, these speakers are "on spot".
The reality is that no speaker is for everyone, and faults can be found with absolutely ay speaker, but the 901s have fewer faults than most, look good, and present about the widest soundstage I have ever experienced.
I know they can take abuse, as I have seen them blasted from the ceiling in many a night club.
Do I want a pair?
Yes, absolutely. And I know a cousin who has a pair that he does not use, and whose wife wants out of their house. I just can't convince him to part with his vintage Bose 901s, so I guess I'll have to look elsewhere.
Cheers