Yeah, they're a little rough by default, but I've tried a few tweaks with some good results. I like new blender brushes as well. They could be better - like the option of picking your own custom brush tips for a more grainy or smooth blend, but still not bad.
Good question Arshes. I bought my upgrade direct from Autodesk earlier today, received my purchase confirmation emails, but no serial number...yet. I've sent them a message asking what's up but, it being Autodesk, I've not had a reply as of yet. I can continue with the trial but it's a bit annoying having bought a product but not being able to use it as an owner.
I've been playing email ping pong with Autodesk. Keep getting automated replies telling me the numbers are in my account page and in the order fulfilled email...which they aren't. They eventually sent the serial number - problem being that they did not include the product key also. A few more emails later they re-sent the serial number, again without the key.
It was only through personal intervention from the SBPro Product Manager that I got both. I'm still chasing the Autodesk shop for the key, however, to see if they eventually understand that a serial AND a key are required.