There were four of us who go to Prague primarily to see opera, as well as to enjoy the food and drink.
Manesova is a really nice, quiet street in an upmarket area. Lenka's flat is very close to the State Opera and within a healthy walking distance of the National Theatre, and with a decent supermarket close by. Ideal for us.
The flat was actually larger than other 2-bed airBNBs we had rented previously in Prague, and the kitchen was very fully equipped - again good for us, since we like to prepare food for breakfast and after the operas.
Everything was very clean when we arrived.
Our only minor issues were that there was no corkscrew, and no way to prepare ground coffee. We bought both, and left them in the flat, so you should not have to face the same problem!
I should add that we had booked the flat previously, but had cancelled at the last minute due to covid, and on that occasion Lenka had given us a full refund when she did not have to. That's the kind of host she is.