tooooo risky these days mate I did have a few outcalls to home before I got to know my neighbours and before my partner moved in, I work in the building/rent final fit sector and often get access/keys for flats we are working on.
So I have used the empty flats when they are free
It really really unnerved a few of the ones I have booked in fact one refused to stay in an empty flat with just bed and a few toiletries and towel is not what most expect
Although almost being walked in on by letting agent one evening did worry me in fact I went pale I locked the door luckly with the chubb and had put the inner latch lock on too on hearing the trying of diffrent keys I just kept quite till they went away next day I was asked if I could give them a set of new keys
I explained we changed lock as was sticking but would put back the old one when repaired
fortunately girl
was understanding and laughed it off that was about 8 years ago I`d die of a heart attack if it happened now