I have purchased both Canvas 6 PRO and Canvas 6. For last 2-3 months I am using both mobiles.
Cons :
I think Micromax Doesnt have a good strategy for youth, who are the target users for all smartphone companies but Not by micromax. As you can see in Canvas 6 - A Slow Processor ( 1.3 Ghz) is there, ( in terms of GAMES) , after using few months I can tell its a Pathetic Experience with Micromax Canvas 6. I bought this from Micromaxs website only and received a defected piece then asked for changing the device and they told 100s of stupid reasons not to change it. Then after it is in service centre for 1 month. they are just delaying it whenever I call even after 1 month. so suggest not to buy