PSA: we need more HAMs out there! Check out https://hamstudy.org and get your license https://hamstudy.org/sessions/remote
Note that the RH 660s is 27 centimeters collapsed (11 inches), and 1 meter fully extended. It is rigid so not one of the floppy antennas. Collapsed it can take abuse, but when extended, bending is a risk.
The hash is just a reason for people to complain about them. As shipped from the factory, they're below the minimum hash levels required. Now, if you connect them to a cheap RF amplifier, you might run afoul of your license's rules about hashing up the harmonics.
Personally i prefer quansheng, as their speakers are louder, but i've never had an issue with a baofeng, especially with an external speaker/mic/antenna.
for posterity, i am extremely tired, and i welcome all elucidations and corrections, because i'm probably misremembering something, here.