I have this notebook for several months, so I want to give review for it based on my experience.
When I bought it (for 14M IDR or about 1000 USD), previously I wanted to buy a macbook air. But it turned out that with the money I could get a laptop with the same convenience but much more advanced specs (The same level with the new macbook pro but with half of its lowest price). Yes! this zenbook UX303lb. Very thin, very light, and very sturdy. What I love the most is its flexibility. You can upgrade the RAM and hard drive easily, unlike other ultrabook. It has many ports, three USB 3.0 (one with fast charging), HDMI port, Display port, and SD card reader (look at the new macbook, just one port for ALL needs). The design is very beautiful and feels bold. And nowadays, windows still dominate the market, so I won't worry with all the software I want to use.
I had confusion when i chose this, whether to buy the new UX305 or this UX303lb. UX305 has lower specs for the same price, but UX305 is fanless, has longer battery life, thinner, and much lighter. Eventually i chose UX303lb because it has the newest Intel Core i7 (vs Intel Core M in the UX305), dedicated graphic card (NVIDIA GeForce 940m), 8GB RAM, and 1TB hard drive. For long usage, I think the specs can support me for both educational and profesional use.
So far, I'm quite pleased with this laptop. I had Sony VAIO before this (still a great laptop for 5 years) so the bar was set high. ASUS UX303lb has a great specs for all modern application. It is very fast; great for gaming, software simulation, or just daily office. The compact body make it so mobile and doesn't hurt your shoulder. The battery life is so-so, great for office (can survive 5+ hours) but not so great for heavy use (2-3 hours. Just look at the specs!). But I dislike the keyboard and touchpad. It's not as comfortable as Sony has, I mistyped and misclicked very often.
Overall, the ASUS Zenbook is such a laptop that I would recommend. It has qualities of a macbook (great design and materials), but has the flexibility of a Windows PC (with a reasonable price, obviously).