Absolutely amazing experience... every time! I've been there several times - in summer with open terrace and a great view on Warsaw and in winter, when the main party is inside.
I am regular clubber in Warsaw for 12 years and this club is definitely one of the best ones in the city - no wonder it is amongst 100 best clubs in the world. Great music, beautiful women (not important for me as I am in a relationship), very nice atmosphere (not only staff but also carefully selected guests). Recently, the experience was even better - I booked the lounge on my birthday and, although it was regular one, I felt like a VIP. We had the nicest (I mean her approach to guests) waitress I have ever met. The gift from the club (sparkling wine and cake - very tasty BTW) was served in an unique, attractive way. Maybe it looks cheesy from outside but being part of the experience changes perception and it becomes a nice addition.
All my guests were delighted as well.
To sum up, while going to Level 27 Club I am always certain I will spend there great time and have much fun.
Everyone may find there something to enjoy... well, personally I enjoy there everything :)