Bit late getting here
I took RLT tablets in both pregnancies, though with DD1 I started at 39 weeks (too late) so with DD2 I started at 34 weeks.
I used the tablets, (blackmores) and the drink.
The uterus is a muscle, and like any muscle it works better when used/toned,and this is what RLT does, helps your uterus 'work' better.
Beware though, some women who have sensitive uterus can go into early labour from RLT and also it can make your labour quick, I know you are all thinking yay quick labour, but sometimes it is too quick.
I talked to my GP/midwife about taking it as I had terrible first birth, and it was advised I take it. My labour shortened from 20 hours to just 5hrs

Good luck...