Samyang 14mm for RF

Bennymiata

EOS R
CR Pro
I would love to buy the Canon 15-35, but the cost is prohibitive so I'm thinking about the Samyang 14mm f2.8 AF for my R.
Reports on it are pretty good, but I was wondering if any of you learned people have one and what your thoughts are on the Samyang.
Is it worth buying?