Hi Bethany
going on my past experiences with WW I know its a very good dieting system. I lost over 5 stone doing it. (ok I put some of it back on but thats entirely my own doing!!, I stopped going to class once at target, moved house etc etc so lost the plot a bit.

)
WW is very well known, lots of back up and support, products on the shelf already pointed and its so easy to do once you get to grips with pointing food.
Its very easy to do. Stick to your points and you will loose weight.
I dont know the Unit diet but it sounds very similar, but perhaps with it not being so well known it doesnt give the back up and support you need right now.
Why dont you consider when your membership runs out of the Unit, to go and join a WW group and try that for a while ? if you dont like it and prefer the Unit then go back to that one.
It may be worth considering, and sometimes a change in a dieting method can work wonders and give you renewed enthusiasm.
Best wishes for whichever you decide to do.
Deb x