Well, I own a Karizma R since Dec 2008. One amazing bike! If you think too much about fuel economy, this is not the bike for you. Honestly speaking, mileage is 30-35. Looks are great. The best part is the good feeling you get when u zoom from 0-60 km in 3.8 s . Stand at any place and u deserve a second look.
Any girl sitting behind you will feel good. Personal experience.
Had a slightly hefty girl (read 60kgs) sit behind me once... and had to travel through Ghats. Karizma left behind the other bikes by a km on a 10 km stretch . Acceleration is top class. Three people on the bike and still u can touch 80 kmph easily.(not advisable to try this though!!!!) Honda engine quality is something u can always depend upon. For all guys who think of fuel efficiency, remember its quality riding and a little more expenditure on fuel is worth it.
Low maintenance though spares are a bit costly. Happy that I did the right choice though Pulsar 220 was another option. Pulsar guys are now unhappy after 2 years. Karizma Rocks!!