I’ve been doing it for a few months and much prefer it to normal artic driving, mostly because there are fewer nutty car drivers and only gotta watch for Hermes and Tuffnells units.
Did have problems with staying awake for first week but now get better sleep than when doing 15 hour days getting up at 4am.
Food does seem to be every different, still got bag of snacks like days and still not size 20. Naturally i only eat when stationary incase vosa are watching. 
Talking of vosa, very rarely see them unless running late on return to depot although police do occasional ADR checks.
Biggest headaches are road closures. For me its M1, A50, M62, A52, A38, A47 and M6 are regularly shut but random locations and random times.