Sorry I haven't replied sooner, but i didn't want to comment since I've not done a complete grow in one yet. i've only just switched over to 12/12 but seeing as no one else has commented I'll tell you what I know. I bought the super closet one. They are too expensive! But you probably know that already!

they are also very big for a closet. When I bought it I thought that it would look just like another wardrobe, it didn't! it's huge. Sure when locked and closed someone can't see what's in there, but they are not what I'd call stealth!
Ok, let me explain how mine is setup. I don't think they do them with all the control panels in the top area anymore, unless you get the largest size. I got one of the smaller sizes... its big enough! You're most likely going to need the optional cool tube plus an carbon filter. When these are mounted inside the grow area it takes quite a lot of space, and hooking everything up with ducting is a bit of a pain, but to be fair growing in an enclosed space like a closet is always going to be a pain.
When i bought mine, the guy in the shop advised me to hook up the carbon filter to the cool tube via ducting, then the other end of the cool tube is connected to the RVK fan that comes with it. Note that the top section of the closet is exactly the right height to fit a 5'' (125mm) RVK. (The closet has space for 3 RVK in the top section).
After a month running in this configuration with no other alterations here's what happened.
- I got EXCELLENT growth... nice bushy plants with no stretching.
- You'll notice the closet leaks light! Lots of it, all over the place, so much for stealth!

- Temperatures were too high! They ran from about 27c to 33c. I was constantly leaving the door open to cool the grown area. Out of desperation I bought another 125mm RVK fan because the passive air intakes at the botton of the closet were useless (so i thought, doh!) and had that blowing cool air into the chamber, this proved useless!
Here's what I did to fix the problems. I only thought of doing the next bit because I was switching over to 12/12, so i wanted to seal out any light leaks & improve the the extraction via the carbon filter. As it turns it it fixed my temperature problems as well.
I sealed all the cracks in the cupboard using tape. THIS IS A MUST! As soon as I did that, i actually sat inside the cupboard with the extract fan on (connected to the carbon filter) so i could see exactly how dark it was. The first thing i noticed was that passive air intake hole at the back felt like they had fans on them, there was so much air flowing in! (I'm NOT exaggerating)
I connected my cool tube directly to the other RVK fan. The other end of the cool tube was ducted straight out the spare RVK hole. So cool air was sucked in... over the lamp & pushed out the other hole by the fan. At first I thought that because of the bends I had to put in the ducting to do this, the cool tube wouldn't work properly... I was wrong!
With these two modifications,
my max temperature is now 27c (thats with the light (400w sodium) being on for 18 hours!).
What I learnt? Well, i probably didn't need to buy a second RVK! All i had to do was seal up all the damn cracks in the closet! Now I'm perfectly happy with it! Temperatures are fine and easy to control with the temperature controls you get with it.
If you have the space, and you can't be bothered to build your own grow space.... BUY ONE! it's great! 
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PS. Forgot to mention that I use the Wilma dripper system for feeding.