Seems like the thread about SOCAR is gone. Can't find it anymore.
So, I'll create my own experience here lah.
Rented a VW Polo for 3 days. Overall, it cost me about RM 288 or so which includes 1080km of free petrol!!!!

I didn't actually utilize 1000kms as I was going around in the city only. I think I covered about 300-400kms only.
So, the car had been driven to 7k kms already and the condition is still not too bad. Engine, suspension etc are still in almost new car condition. No dents or scratches but the cabin reeks of cigarettes

Made a complaint to SOCAR and they apologies and told me to send it for a car wash and in return, they'll give me 1 hr free?!?!

err... no thanks!
Overall, quite a good experience from downloading the app, registering yourself and taking the car from certain location.
Ta!
