You better ask this question in Iriz thread.
No point open the thread here as you unlikely will get honest answer. Mostly from non Iriz owner.

Bought the car on launch day.  Full spec.  So far, no major problem.  Only the outside roof side plastic came off.  Other than that its good. Ohh.. maybe the reverse sensor, which is known to be a problem since exora/preve.  They use same vendor.  It is not sensitive enough. For future model, they changed to another vendor. The head unit, people say it always hang.  It will, but if you be delicate on it, and always switch off before you turn off the engine, its all good. It's a very low performance arm chip that easily heat up. Other than that, it is a brilliant car.

If you not looking for hatchback, maybe wait for the new Persona based on the Iriz platform.  You'll probably get a better gearbox from Jatco.  Also heard they will replacing the Iriz gearbox with Jatco, but i don't think that will happened this year. Maybe next year when the FL the Iriz.