I've ridden dozens of bikes over the years and I find the Roadster one of the easiest, I'm 6'4" though and often wonder how smaller people react as the bike is physically so very large. The power comes in huge gobs when you wind the throttle but I still max the throttle everywhere, it's well planted, comfortable and gives good enough power in all gears to make it surprisingly easy to ride. I hopped on to my friends 2010 ZX10r the other day, felt like I was balancing on a cheese wire and was going to fall of the front at first, after folding myself up into a tiny and worryingly painful ball I then proceeded to frighten myself silly. What got me was how easy it is to ride fast and on the edge, far more dangerous in my opinion- bet the salesman wouldn't laugh at that choice.. The rocket is quick, for about 2 seconds then these litre supersports leave it dead. My biggest concern as a newbie would be wheeling the bike in and out of the garage and handling below 10mph, it's super well balanced though so I say do it! (Provided your 6'4" and bristling with muscle)