Hello,
I have an ARGC baby, after several failed cycles elsewhere. Firstly, if you can be very flexible with the appointment date and time you can get seen sooner, just tell them you will take a cancellation.
The website Fertility friends has alot of info on ARGC, and they are a fantastic resource for during treatment.
I believe them to be worth it :) It did cost me a total of 20K though which included travel, so definitely not a cheap option. It is like IVF bootcamp, very intense, lots of trips to London. It will not be what you expect either! Its organised chaos, often with people queuing to the door at 7.30am. They dont forget you though, even though they work on paper files and not computers.
They will get you drinking lots of milk once treatment begins, related to egg quality I think. They dont worry about AMH levels IIRC, but are concerned with FSH.
I took vitamins, ate Brazil nuts, drank pineapple juice, had acupuncture gave up caffeine and alcohol prior to treatment, mainly as it was my last throw of the dice and I wanted no regrets if it failed, who knows if any of that helped.
Just a word of warning, their walls are plastered with baby pics, I found this incredibly hard on the first visit (very soon after a recent IVF failure) and although I see why they do it, I wish they wouldnt!
Hope it all works out for you both