Pick up Mega Collection instead.
My recommendation is with this money, pick up the original four 1991-94 Sonics for Genesis, one copy for you and your friend. Or pick up Mega Collection - that is what SEGA should be focusing on.
That said, SEGA is still a great company - I'm giving this game a 3.0 even though I'm a SEGA guy - but the company still has potential. I, myself, would like to see a new 2D Sonic game made in the vein of the original Sonic games of the good days.