UC Wheelchair access

My parents are both wheelchair users and I was trying to sell them on the advantages of the VS UC service - not that I have experienced it myself but I know my mum in particular would like to sleep on a long haul flight.
However, I read a comment on Skytrax that said it is difficult for people with mobility problems to use the UC seats.
Does anyone have any experience of this?
Best wishes
Paul
However, I read a comment on Skytrax that said it is difficult for people with mobility problems to use the UC seats.
Does anyone have any experience of this?
Best wishes
Paul