i've done hair extension whole head for more than a year....

yeah... its look great....
especially if u curl it use curler.. its look it lolita... i always do that
but u dunno how suffer to take care your hair.... 

i change my hair twice a year,,,, and my hair is 100% human hair...

there's lots lot problem when u do hair extension,,,

1. u cannot comb your hair
2. u must check what method they use to extense the hair
3. if use glue,,, then that the worst !!! because when u wash ur hair u must wash it gently , if not all become tangle. u cannot use hot water because ur glue will melt and they will stick with each other. eventhough u use cold water, the glue will also become soft n sometimes can stick with each other.
4. hard to dry eventhough u use hair dyer
5. when u want to open all the extention, ur have lots of tangle. and there's alot of people that need to cut until look like guys coz of that. ( i know because when i go saloon to stick back some of the droping hair, i saw them doing it)
6. must always go saloon. ask them to repair the glue. if not u will have a bee nest. yeah look nice from outside but under ur hair all the glue stick together,,,,
7. there's big posibilty u get dandruff. because u cant scrub ur hair...
8. still alot....

ok...
if u really want it...
u go to cut above saloon... they only charging rm10  per hair... but it's for student not prof....