Mattjwood
Have only done it once, and it was 10 years ago, but I did have the A/C to myself, apart from crew obviously. She was coming to Europe anyway, and my then CEO had retained me in the US resulting in me missing my flight, and kindly offered me the option which I have to say I jumped at. Interestingly you do seem to fly higher than commercial A/C as I think we crossed at 40,000ft + where normally you are anywhere between 34- 39 in my experience, perhaps some Biz Jet drivers could comment on that.
Regards
Mr Mac