Yeah I rarely go above 90-110watts myself but its good to know its there if you need it, and the basic improvements of previous iterations make the 150 worth it
Btw I found out that Ebay link I posted is actually for the original batch or sigelei's "test" batch of the 150's. You can tell them apart from the other 150's because they have venting on the side and the buttons are more indented. Does your device ever get hot from chain vaping? Because to me it seems that the bottom venting holes would be plenty.