Reading MN Feminist Corner over the last 4 years has made me realise that I am a radfem
And also made me think a lot more deeply about feminism, so many thanks to all here for that 
The 3 main issues where I have disagreed with some - not all - libfems:
1) "I'm all right, Jill" - so if you aren't, it's because of your poor choices
imo, nothing wrong with earning lots of money, having a great career; Good luck to you if you faced no barriers
It is wrong however to say that other women are not held back by barriers.
Same situation wrt race and class:
Some people of colour have said their colour has never been a barrier, never experienced prejudice or racial abuse.
Ok, I believe their particular case. It certainly wasn't mine.
Some people have risen high and claimed being born very poor was no hindrance in getting a great education and then a high-flying career.
I experienced great poverty and am now comfortably off in a good career, but this required considerable sacrifice & struggle, barriers that those born wealthy did not have to overcome
-
Biological differences to men
Much of the reason women have been disadvantaged and oppressed come from biology.
So merely giving us the same rights as men, does not result in the same opportunities and quality of life
e.g.
a) Physical strength & size
Women are at far greater risk - probably 50x higher - of sexual or physical violence from men, than vice versa.
Women can't compete on equal terms to men, wrt physical strength, speed; even the damage suffered from blows is different.
Ignoring all this puts women in even greater danger and under more disadvantage.
Hence e.g. why equal treatment and allowing men / transwomen into womens' safe spaces, or into sport, damages the rights of women.
As does letting those who grew up with male privilege win awards or grants for women.
b) Child-birth & pregnancy
Most people (but not me !) want kids, but only women bear the physical consequences, which may be life-changing and severe.
Even the most equal partnership can not share that part of the physical load
c) periods that may cause debilitating pain or flodding - so damaging when some women say others should just get suffer at work without any allowance, "if they really want equality" 
I was fortunate not to have much problem, but I would never say this means other women shouldn't be able take an extra sick day - without it counting in the Bradford formula etc
3) Throwing women under the bus
As a mixed race woman aged 61 who grew up very poor,
I am well aware of the discrimination wrt race/religion, class/income/ inheritance, age.
Making life better for most women often means also campaigning for better rights for the less well off, for more action against racism and ageism.
I oppose all forms of discrimination against the disadvantaged.
BUT
I would never remove rights from women, to help other disadvantaged groups
- because that is not fair treatment.
So e.g. I would campaign for extra bathrooms or sports contests for transpeople,
but would never accept that transwomen just be lumped in with women.
I support respect and making reasonable allowances for other religious beliefs,
but never accept that they can refuse (non-religious) jobs or services specifically to women, or to people of other races / religions / sexuality.
I reject any political party which takes it upon themselves to remove hard-won rights for women, to appease misogynists or the trans lobby.