Update: Following further testing after the video. The A55 does not have a higher noise floor/hiss level than the A306, they are roughly the same. There is some barely detectable hiss/noise floor with the Fiio JD7 on the A306 and A55. As I stated in the video, the noise floor will vary/disappear on both the A55 & A306 depending on your equipment (IEMs, Headphones).

My thoughts on the Sony A306 DAP.

A good UK based seller for a new Japanese uncapped volume Sony NWA306: https://www.ebay.co.uk/usr/neetex

Covered in the video (in no particular order):
A306 does gapless with AIFF format via native app
A look at the physical device (button layout, etc)
Comparisons with the Sony A55
Comparisons to the Hiby R3 ii, M300
Walkthrough of the Sony OS/Music playback app
Screen
Boot up time
What I like and dislike about Sony OS/Music playback app
Speed, fluidity, responsiveness of the A306 and software/UI
Ergonomics/one handed use
Battery life (at least 31 hours tested)
Degoogling the device, as best possible
System settings to optimise battery life
Restricting the preinstalled google bloatware/apps
This is an uncapped volume Japanese model
Some models are volume capped, based on your region
Noise floor/level of hiss
Ability to drive my IEMs (FH3, JD7, IE600) & headphone (DT 700 Pro)
Qobuz degoogled, offline playback
Brave browser degoogled
Aurora Store degoogled
Runs on Android 13 once updated, ships with Android 12
A306 is the best small DAP that I have used

Battery test was done using the Fiio FH3 with the volume at 66 mostly playing 16bit, 44.1kHz AIFF files on the Sony native music player app.