Pros: LONG, forgiving, looks cool, easily adjustable
I've had this club since the beginning of this year at have no complaints. My previous driver was the Cobra S3 and I decided to take the Bio Cell over Callaway's Big Bertha (partially because it cost $100 less) as those were the only two drivers that impressed me. I have easily gained 10 yards over the S3. I was concerned about how straight I would be hitting this club because it is slightly longer than my S3 is, but to my surprise I am hitting it MUCH straighter. The adjustability is quite simple. One driver with all the lofts you need as well as a draw bias. It's easy to change the loft depending on the wind for that day right before a round if you need to. I also think this is arguably the best looking driver on the market, though that shouldn't by any means be a priority in choosing a club. It's all about how well you hit it. If you are in the market for a driver, I definitely wouldn't look past this.