I can't comment on the Judith Williams as I have never used it, but from what I have seen on air it seems like an affordable range with a few plant ingredients.
I am new to using Sarah Chapman and absolutely love it. I have been using the eye cream, serum and day cream for about 2 weeks and noticed an immediate difference in my skin. My eyes are brighter and more awake looking, my skin tone is more uniform and my pores appear smaller. I'm 42 and have always used Decleor, Elemis and Liz Earle. I have never seen such a difference in my skin with the other brands. Her products have no parabens but are packed with plant oils and peptides. It's quite expensive but I got the eye cream on Beauty Day and received the two other products as a bonus. I would definately repurchase the eye cream and if they ever did a TSV would be interested. I have ordered the discovery set on easy pay so I can try the cleanser too.
Hope this helps.