Hi Jo g
I'm a returning newbie and just saw your question.
HRT works wonders for my insomnia, I've been on it for several years and the times I've tried to come off it or had to for some other reason I have had the horrendous insomnia return. Not being able to get off to sleep then wakening a couple of hours later. Getting up and pacing about, going down to put the kettle on, back up to try to sleep again. Up again, etc. etc.
Only having about 3 or 4 hours of disturbed sleep a night made me feel ill during the days. Once back on the HRT within a week I was sleeping normally again.
So for me it has been wonderful in that respect.
Good luck
Clara