Unique used to be the most hot selling and reliable machine back when they launched in Karachi. I own one and never faced any issue and it's with me for the last 11 years. But now almost all bikes have changed a bit in terms of weight hence their durability is like paper and same is the case with Honda 70. They are milking their name. United I think is famous among chondas in Punjab so it should be your best bet. A little quality issues here and there might be there but those are with the latest Honda CG 125 anyways.
The only drawback I see in buying a Chinese Replica of Honda is it's resell value. But if you have no plans of upgrading soon or selling at all then Chonda all the way.