Hello
szerma, I'm 41 and have done 2 IVF cycles, both of which resulted in pregnancies at the Lister (I have a DD aged 2). I also have a low ovarian reserve, in fact it's fairly low for my age, so everyone (from nurses to sonographer to consultant) were so pleased that a) we got viable eggs out of me, b) they all fertilised and c) it resulted in a pregnancy! I would definitely recommend the Lister as they have been unfailingly professional and courteous every time, and I think also their success rate is better for women in our age group.
Re appointments: at the Lister they do scans in the morning for follicle growth and then blood test so that they can analyse the results of the test and then let you know later that day if you need to adjust your meds so that you can do it immediately later that day (my appointments were usually 8.45-9am).
Also as you're BTC (I'm in CC Northside) then the Lister is pretty good in terms of getting to work if your office is in central London as it's quite close to Victoria. Oh, and getting there is a doodle, quick bus ride and walkable too!
WRT IVF itself, I think it depends on each woman but to be honest the process wasn't that bad for me. Once I got into the routine the injections just become another thing I had to do every night. And I wasn't any more grumpy, hormonal or tired than I usually am
Good luck, I hope it all works out and please feel free to PM me.