Been there a few times over the last year, most recently this week. I tried the private entrance the first time I went and it was locked, but the main entrance is on a quiet street off K road. Even there you won't see too many people around outside. Front doors usually unlocked so you can walk straight in.
I've always just dealt with one guy once inside even though I could hear other staff in the background, unfortunately never seen the fabled hot receptionist

(or gotten standing applause smh..) They bring you straight to a private room and show you the women one by one, then when you pick one and pay the guy disappears. Never got any bad vibes from the staff, they're polite and hospitable, they do just want to you to book someone so they can take your money, but it didn't feel pushy at all.
Good:
I'm new to punting (<10), but having gone to a few other places vixens is the best place I've been to, went at a quiet time recently so delightfully had my full choice of the roster, picked Phoebe and she was very good. Not the best WG ive ever seen there sadly, there was a Japanese woman that's now gone who almost telepathically knew what I wanted. I thought of writing a Phoebe review but I see its been done and imo was pretty accurate. I think Phoebe's hotter than other people said, especially her face, but doesn't suck dick as well other reviewers said (still good though). Body is great but she definitely' does not have "D cups" like the website says, I'd guess B/C.
Vixens also doesn't B&S with the photos on their website ime. "improved" photos but not a different person
Bad:
Towels were put down but the mattress cover was in need of repair. Flakes of the mattress outer ended up on my legs which was confusing until my esteemed companion explained the issue.
Lights are too dim. The WGs are actually hot, dim lighting discourages me, id understand the low lighting if they're gruesome, but there's no need for it at vixens that has legit hotties.
Expensive. I do like the ability to just walk in any time, but even with the good service its pricey, and there are competitors