I've had it as well. I had 2 infusions, one 2 days before embryo transfer and one at 6 weeks pg. Initially I wasn't very keen to have it and I certainly wasn't under any clinical pressure to have it. The clinical evidence for its effectiveness is scant so it's not available on NHS. That said I do know of someone with a sympathetic GP who converted her private script to an NHS one on the basis that it was a treatment for recurrent m/c.
Not sure about the other clinics but the Lister don't administer it so they don't make any £ from it. They send the script to Healthcare at Home and a nurse comes to your house and administers it. You pay HAH directly, not the clinic.
I had my NK cells tested through the Lister clinic and they came back as significantly elevated. I did 2 cycles just using high dose steroids - one chemical pg and then a missed m/c. Next cycle we decided to roll out the big guns and added the IVIG - my test results showed that it had a significantly greater killing power than steroids.
My son was born as a result of our first ICSI tx and thereafter followed 3 bfns, 4 chemical pgs and 2 missed m/cs. Then the IVIG cycle. In addition to the IVIG we also did PGS for aneupoidy. I am now 21 weeks pg, so still early days.
For me, I feel absolutely that i would not be pg without it. The PGS absolutely has an effect too but I feel that the IVIG has been significant in the pg continuing as I didn't seem to have any problem becoming pg, just staying pg.
In all of my cycles following my son I had a peculiar set of symptoms in the 2ww and early pg. A weird shivering and sneezing but no fever - now I realise considered classic immune response. I started to get these again about 3 - 4 weeks after my first IVIG and sure enough my NKs were elevated again. Haven't had them since the second infusion. I mentioned these weird symptoms to my first clinic and they dismissed them as irrelevant but the Lister didn't.
If you do go to the Lister ask for Dr Yau Thum - he's the expert there. If you google him you can see some of his research.
A good book if you haven't come across it is 'Is your body baby friendly?' by Alan Beer - well worth a read and explains it all. Also if you log onto www.fertilityfriends.co.uk you'll find lots of women who have had immune tx and have a lot more knowledge than I.
Any other questions I can help with, do shout.