is Xperia ZR still worth buying? (transition from ASUS Zenfone 5)

so, recently my local used phone shop got tons of used Xperia ZR docomo, with 2GB RAM and 32GB internal.
until this time, I'm using ASUS Zenfone 5 (ASUS_T00F) with 2GB RAM and 8GB internal, which sucks (and everybody knows ASUS have A LOT of bloatware).

is this phone still worth buying? they are sold like here.
and what should I check first when buying?

thanks!