Let me just start by saying I love this laptop! The build quality is great. They use plastic, but it is good quality plastic on the body. The one I have is in a mate grey finish- Graphite Grey. I like how it does not attract so many fingerprint smudges. The hinges are aluminum, and very sturdy and stiff. Overall, I find the device to be aesthetically pleasing, compact and high quality. The keyboard has backlit tactile keys with spaces in- between. They are clicky and are quite satisfying to press. I also appreciate the great looking screen, which I have been consuming a lot of content on; think movies, You Tube videos, books... The speakers also sound good. They are top firing and get pretty loud for all my video and music consumption. Even in tablet mode they sound good.The bezels on either side of the device are slim, but there is a thick one on top and an ever thicker one on the bottom, which eats into the screen real estate.The battery life on this thing I find to be really impressive, lasting me 6-7 hours in normal use, surfing the web, watching a movie, writing on the screen, etc... And also impressive is the fast 65 W charger which comes in the box, which charges the battery from flat to full in just over an hour.On the software front, the laptop ships with Windows 10 Home, and I quite enjoy this software. Although by the time it reaches you, this machine will be ready to update to Windows 11.The Lenovo Flex 5 14 (AMD Ryzen 5 4500U) ships with the Lenovo Base Pen II bundled in at no extra cost. I applaud Lenovo for this decision. Base Pen II has two barrel buttons. It has no top Bluetooth button. It also does not support tilt. Out of the box, the bottom barrel button works as an eraser, while the top one is programmed to right click, pretty much as a mouse would do. You can always change this in the Lenovo Pen Settings app, but I kept them as is.The pen looks and works amazing. I am not sure what levels of pressure sensitivity it has, but it is plenty sensitive for what I use it for, which is taking handwritten notes in OneNote and Journal, selecting, annotating PDF's and so forth. I haven't tried drawing with it, but if you are interested in its drawing capabilities, Shogmaster has a detailed video of that on You Tube.The pen is made of aluminum. It takes one AAAA battery, which is included. There is no pairing necessary. As soon as you insert the battery, it is ready to use. The battery lasts quite a while; mine has been going now for five months. The top screw on part of the pen is not completely cylindrical like the rest of the body. It juts out ever so slightly, with some subtle Lenovo branding which is only visible if it catches the light. This slight protrusion on the pen is handy in making sure that it does not roll around on a flat surface, potentially falling from a height.While I love this pen, I wish Lenovo had put some sort of coating around the austere metal finish to make it more comfortable in hand like Dell did with their pens, such as the PN350M Dell Active Pen which has a rubbery coating. As it is, the Lenovo pen is quite slippery in the hand.The writing experience is good, once you get used to it. At first, it felt really slippery writing on glass, but the feeling of control came back in measure once I embraced the slippery. Just know that using this pen is never going to feel like pen and paper, because glass is slippery, always will be. But overall, a great accessory to a great device. Good on Lenovo for including this pen with the purchase. Saved me the hassle of finding a compatible pen, and a few bucks to boot. I later saw the pen listed here on Amazon as 'Active Pen for Lenovo GX80U45010' . It has 4096 levels of pressure sensitivity and was retailing for $43.AMD's Ryzen 5 4500U processor is quite impressive. It feels quick and snappy. I have not experienced much (if any) lag at all. Although it does get warm on the underside of the keyboard, especially when using the pen to take notes. I imagine there is quite a fair bit of processing going on when you write on the screen in OneNote or something like that.The Flex 5 form factor is phenomenal. I will never go back to a traditional clam shell design ever again. The 2- in - 1 design just allows me to do more with my laptop. No more multiple notebooks or lost notes; all of my ideas in one place. I tend to go for apps which are touch optimised such as ACG Media Player, Xodo PDF Reader and Microsoft Journal to take advantage of the touch interface. It really is very useful to execute commands with your fingers, or digital pen, instead of always having to jump on the track pad or mouse.The placement of the power button is one caveat I have to point out. Its placement is awkward, at best. It is located on the right side of the keyboard, as opposed to its traditional placement on the top right part of the keyboard, which in my opinion, makes better sense. In its actual location, it is fairly easy to turn off the computer screen while performing a multiplicity of routine actions such as lifting the laptop, or switching to tablet \ tent mode. But that aside, this really is stunning value (16GB/ 256GB SSD) for the asking price ( I got this from Amazon for just over $ 600). And Amazon also has great service, just great. A really pleasant company to deal with.