I bought the sprinter because it interested me with its limited numbers(you'll only see one in a week or so), weird shape and that engine. First off, the good stuff. Its engine is fantastic. I've currently driven it 4000KM without any tuning just oil changes and it's performing beautifully still. Gives excellent mileage last time it gave me 58KM/L and i did not drive it with economy in mind. The handlebars are very wide so your arms feel relaxed and you have greater control over the bike. Subjectively, the sound of the engine is also addictive if you're into that sort of thing. So if you're going to buy this bike, it's only going to be because of its engine.
Bad points: Paint finish is horrible. Koi parinda bhi beth jaye tanki par to paint utar jata hai Seat height is 31 inches meaning anyone below 5'8" will have trouble keeping both feet on the ground. The seat is basically a large brick as pointed out by waqar bhai. Forget comfort, within 1 hour of driving this you'll feel a pain in your back.
Otherwise, all the parts of high quality hell even the footrest pads have S etched into them i.e. the whole bike is using parts made for Suzuki especially. Engine is solid and i personally believe is one of the most reliable engines in Pakistani production bikes. Certainly a class-leader (100-110cc).
If you're going for comfort then it's not the bike for you