I never saw the point of Clarins until I turned 40 and now I love it. The Extra Firming Night cream is really good - doesn't make me break out and gives my skin a little oomph. I got a sample size of the Extra Firming Day Cream in the gift with purchase Boots are currently running, so I'm looking forward to trying that out. I love Beauty Flash, and use it every day. Hydra Quench is a great range for dehydrated skin, and I use the normal moisturiser as an eye cream - it's good.
I also really like their fragrances - in the Summer, I use either Eau Ressourcante or Eau Des Jardins every day, it's lovely. It's not long lasting, but's it's great to use after my morning shower and makes me feel really fresh.
I use the self-tanning drops that you mix in with body lotion - these are the best way to offset my ultra white skin I've found, and fairly hassle free. The face beauty boosters - hmm, not sure. I have the orange ones and I'm not really sure they make a difference. Not sure I'll repurchase.
The exfoliating toner made my skin break out really badly and I had to stop using it - it was just too active for my skin.
I would strongly advise, if there are a couple of items you want to try, finding a Gift With Purchase as they do really generous sample sizes in the gifts. In the one Boots is running now, they have 100ml sizes of body lotion and scrub (both fab), 30ml sizes of moisturisers (considering the full sizes are 50ml, and cost c.£50, this is a great way to try out a few things). I think they have a facial oil too, can't remember.