Pro vocal booth consideration

This is a little long and off the subject, but a vote for the tube traps.
Yes, they are expensive bought at first and DIY is time consuming (finding the parts, sawing, cutting, upholstering, etc. and the place to do it.
But either way they are a solid long term investment. How much do you spend on gear.
The new ones I built are the inter thermal Traps, better performing but more complicated to build.
My tracking room has 6' towers in all four corners, and half rounds on the walls, live wood floor and a dead 16' ceiling. Upper half slatted walls. Built for live group tracking, A lost art.

Just had the first live practice, drums, bass, guitar, keyboards. The room was rocking. The tube traps were vibrating when you touched them
Every body was amazed at the fact they could play that loud and really hear each other,
in a room that was very even sounding, no bass build up, lively not dead. Just smiles.
The tube traps sounded invisible yet did their job.
I a circle they create and even sounding vocal environment and great isolation around amps and instruments.

There are 50 tube traps in the back studio creating an attack wall, side walls and upper ceiling corners, making a live tiled area into a accurate controlled monitoring environment.

I've got the wall mounted bass traps, walls of diffusers, slatted walls, but the tube traps play an important and versatile  part of the studio's sound.

No boxy booth.

No no no but I need them now lol. Probably an attack wall too, their special monitor stands too and the sub stand lol !

I like my room as is, all the wall, ground to ceiling are covered with art books, which, for many reasons is super great. I left the books in place because they scatter the sound nicely and are oh so inspiring. And in the corners I have two PSI avaas (plan on getting four), and two large bulky uber-heavy broad band home-made membrane type basstraps (but I didn't liked building them, it's not my thing and I don't want to do that ever again brrrrr). I like the room, but I'm pretty sure, after reading a bit about ASC, that their range of product would make drastic improvements. I wonder if GIK turbo traps are the same thing as ASC tube and studio traps. They don't seem to have the reflective sides, which is a let down. Maybe I don't need the reflective sides for an attack wall that much, but for tracking, reviews say that the reflective sides pointing toward the mic is the secret sauce in a Quick sound field setting. It provides beautiful early reflections, makes the room quieter & the singer louder : I'd like that, yes !!! 

Not to the hijack the thread but how does everyone feel about the same thing (treated booths) for guitar amplifier recording instead?

Same with bass cab. Had a Mesa 6x10 mic’d in a closet for years. Could have drummer, guitarist, and bassist standing in the live room, feeding off their energy while keeping drums and amps all isolated. Killer way to work.

A well treated booth and cabs work great, but you will learn 2 things first sometimes you need to roll it out into the big room and with the booth sometimes you just need to open the door and let it breath.