Too crowded.
Same type of shopping malls everywhere. AND you may find the imported goods are more expensive than the US.
People don't wear a smile, except salespersons.
Hot and wet.
Not much sightseeing.
There is no local products. Most are made in China.
Taxi drivers always cheat foreigners.
Few free wifi in the city. The only way u can get online is to buy a local prepaid sim card.
No fun at all. Boring.
Street performing artists are all low quality and bad taste. Many of them are China.
p.s. Hong Kong and China is totally different.