The version that comes with Sonar is a good version but is nothing like the full version. $50 is nothing to pay for the full upgrade. You get more GTs and a lot more control. 

 
The upgrade to full version from session is currently 39$ Cdn (~28 $US).
 
(Go to the very bottom of the page.)
 
EDIT :  sorry to have transmitted wrong good news.
 
 

 

Paul P
 
The upgrade to full version from session is currently 39$ Cdn (~28 $US).
 
(Go to the very bottom of the page.)
 

At bottom of the page "Session Upgrade" now showing 49$ and that is US$ I think..

Snehankur
At bottom of the page "Session Upgrade" now showing 49$ and that is US$ I think..

I guess it was too good to be true.  I still see 39$ at the bottom of the page but when I click on the button it takes me to another similar page on which it says 49$.
 
But this not useful anyway since I've found out that Platinum comes with Session 'SONAR Edition' with has no serial number that I can find and that is required to get to the upgrade.
 
EDIT :  Has anyone actually upgraded from Platinum's edition for 50$ that is mentioned above ?
 
EDIT 2 :  Ok, it's 49$US in the Cakewalk store once you put it in your cart.  Nice price but just a bit more than I can justify for the moment.
 

Paul P
EDIT 2 :  Ok, it's 49$US in the Cakewalk store once you put it in your cart.  Nice price but just a bit more than I can justify for the moment.

For me too.