We flew L'viv - Luton on the 8th of Feb, and there were 80 on board. The four of us paid only 85p each (+ c/c charge) and had four rows to ourselves. The only advertising at L'viv airport was one A3 poster in the window of a building to the right of the main terminal saying that you could check-in for Wizz there.
Flight was on time, but the crew were unable to sell us anything on board due to not having regulatory permission to do so(?) and as such we were offered free tea, coffee, water and orange juice.
I'm doing Luton - Katowice - Kiev - Simferopol - Kiev - Oslo Torp next month so will report back any findings after that. I really think they need to advertise more in Ukraine though... we saw nothing anywhere in L'viv, but loads of posters all over London.