While the PL4500 gaming chair is nice-looking and comfortable to sit in, Vertagear missed the mark in several areas with this model. First, the slide-in backrest design is anything but easy when attempting to install the custom M8 screws to secure the backrest. Second, the lumbar support is way too bulky for comfortable use. Third, in addition to having thinner stuffing, the lumbar support pillow also needs up and down movement on straps for stationary positioning. Without adjustability on straps, it requires you to reposition the support every time you get up or change positions in the chair. Fourth, when locked, the lever for the angle-adjustable backrest presses firmly against the PVC leather side. Unsure if this will cause it to eventually cut into the PVC leather and/or stitching. Lastly, Vertagear needs to drastically improve their quality control (e.g., raveling of stitching, poor painting of some of the metal parts leaving bare metal areas open to rust, sharp areas on the plastic backrest pass-through-holes sharp enough to cut skin, poor deburring of the metal backrest adjustment lever leaving very sharp edges, sloppy finishing of the PVC leather on the rear of the backrest). Unfortunately for me, I purchased this chair thinking it would be an upgrade for a Pro X Series gaming chair–it wasn’t. The PL4500 has the makings of a great chair due to the heavy-duty metal parts used. However, to achieve greatness and to justify its price, Vertagear needs to address the shortcomings above and significantly improve their quality control. Until that happens, I would not recommend buying this chair.