People will always talk about what hair extensions are the best ones to choose but to be honest, in my experience it's less about the hair extensions type and more about the hair extensionist doing your hair.
The bottom line is that all extensions can cause natural hair damage when they are:
a. Not taken care of correctly
b.They are poorly installed
c. Left too long in between reinstallation services ( recommended every 4-8 weeks depending on the clients natural hair density and strength)
d. Are poor quality and knot and tangle making it hard to brush with extra pressure on the scalp
Overall, if you are a retailer in hair extensions ; covering as many method types to attract the most customers is recommended.
If you are a hair extensionist ; taking pride and care in your work is the most important part. Learn from specialists in their field and ensure quality work for your customers and business
Clients will gravitate to your business according to what they know about hair extensions, what they have seen on other people and popular types will depend on your niche market and their needs.