I have one. I've used it on:
* female vocals (generally alto, more mumbly and deep than airy or nasally)
* male vox, a tenor with a certain gravelly rasp, kind of a "pretty" voice for lack of better description coming to mind right now
* acoustic guitar
* acoustic piano (conservatory upright)
* room mic for djembe drum, conga, and bongos
Excels at:
* female vocals mentioned above
* acoustic guitar
* room mic for djembe/conga/bongos
Acceptable at:
* male vox mentioned above (I did have to EQ a bit @ about 1.3K if remembering correctly, because that "hype" did something bizarre with the rasp ... but it also smoothed out his voice in other areas and so overall I would say it definitely worked)
* room mic on piano if also using other mics
Unnacceptable at:
* lone mic on piano
Keep in mind I generally don't have a lot of experience and so you should probably take my opinions with a pound of salt. For me, the 4033 did not work at all; when I tried it on my voice, it sounded hyped, whereas the NT2 sounded natural (but flattering). So I would think, if you tried the NT2 and it didn't work for you, perhaps the 4033 would. Warped logic, sure, but maybe having some validity...