I don't really record alot of vocals but I heard alot of good stuff about those reflection filters out there, i heard they make a big difference if you don't have a booth.
Those reflection filters are legit. I put the mic in the middle of the room with the filter behind it, and it definitely helps. The natural reverb is there, but it's just the right amount.
Also, to the cat who posted this thread, microphones really depend on the vocalist. Some mics or good for singers, some good for rappers, some good to capture bass vocals, and some good to capture a higher pitch. It depends on what you're recording. For example, Michael Jackson used an SM57 on Billie Jean, and it came out RAW. I used an SM57 for one of my songs and it sucked because it didn't capture the true sound of my voice. However, the SM57 recorded my boy well because he has a higher pitch than I do.
It depends on who's recording, where they're recording, matching a mic with a voice, and what you know about mixing vocals.
Oh, and those vocal booths are garbage. Go to a studio and they won't put you in a box with foam...they'll put you in a vocal room with some foam strategically placed (if that), or acoustic tile. Many studios are built from the ground up, so they don't have to be "treated"...they are built for recording. A vocal booth muffles the shit out of vocals.