I've was on Cambridge for 10 months in 2006/7 and have been on Exante for just over 3 weeks now. In my opinion, Exante tastes far nicer - not as 'synthetic' and no slightly chemical after taste. I thought Cambridge Choc Orange bars were the worst for this.
The shakes are mild and creamy and I like all the soups perhaps with Tomato and Basil being my least favourite (but acceptable with plenty of black pepper and a dash of chilli powder).
The bars are like big rice krispie cakes - they're filling and tasy. I love them.
Overall, I'd say go for it. And if, after giving it a go, TS isn't for you, it's not a waste of £100 because you can just move up to SS or WS.
Good luck!