I had purchased Honda Unicorn 150 CC 6 years back. I must say, I am very happy with this bike so far. I will not mention any technical details here. Instead I will briefly explain my positives and negatives about this bike based on my experience.
Pros:
I think it has best riding experience in its own segment. Mono-shocks-absorbers work really well.
The engine is smooth like butter
decent mileage
Robust body
Low maintenance bike - even my headlamp went on for 5 years in row.
Large fuel tanker means you can go to petrol pumps less often.
Best choice for long journey. I traveled from Pune to Goa without backache.
Cons:
Chances of getting skid are increased due to smaller size of the tire.
Slightly difficult for ladies with Saree to take the back seat due to increased elevation, but I think this is by designed and the issue(?) exists for all bikes in this category.