First of all - I can definitely recommend this stay!
It's 100% worth it's money (and I've traveled a lot and seen both good and bad apartments).
Place is clean, stylish and very comfortable (it was perfect for our company of 4 people).
You can easily find anything you need - even a single-use toothbrush was there. But not only this, Gabriele offered us to use bikes for free! It was a stunning pleasant surprise (however we didn't use them - metro is quite near, 5 min approx.).
Summarizing all the aspects I can guess that this apartment was one of the best quality/price offers we could possibly get in Vienna.