I wanna try sensa for free but..?!

Skater - it is not free and it doesn't work.
I like to refer to this product as "magic fairy dust" since you sprinkle it on your food. Right!
I promise that if this product worked they would be charging $1000 per treatment,
not $89.95 for a 60 day supply.
Weight loss is a $60 billion per year industry today and these guys are just trying to grab their share.
Be smart.
A healthy diet and exercise work every single time.
$45 per month gets you a decent gym membership, and you get a shower and maybe a steam!

If it really did work why would you need to be offered free gifts as an incentive to purchase?
See the Terms and Conditions below taken from the Sensa web site.
I also love that buying it direct from Sensa saves you 35% off the retail price. Yet it is available at GNC for the exact same price.

You have a full 30 days to try your SENSA 2-Month Starter Kit. If you enjoy SENSA, do nothing and you will be billed for the 2-Month Starter Kit one low payment of $89.95 at the end of the free trial. That's a 35% SAVINGS off the retail price! If you decide to keep your 2-Month Starter Kit, you will be automatically enrolled in our SENSA AutoShip Delivery Service. As part of the SENSA AutoShip Delivery Service, you will receive a fresh 2-month supply of SENSA every 60 days at the low price of only $89.95 so you never run out. You will be charged this price every 60 days, billed to your credit card.
Any free gift is yours to keep.