In my opinion that leather they offer is very poor and substandard. You can get better material and softer leatherite in more than 1/4th the price. Check my thread for the pictures have posted them on this thread as well many times. I got the seats, console and door panels done.
If you are from Lahore I can help you with an amazing job which looks and feels better than oem.
About the oem navigation, that is a must and totally worth it. Also it will help keep your electrical warranty intact. Do go for a sealant coating as well. Check my Oriel X thread for all these things I got done. Rest I haven't added any kit or stuff. Like it stock