[This review was collected as part of a promotion.] Excellent quality and operation. Recommended for professional use and good to have a traveling spare. I wanted to expand the original to fast-charge use and provide ample power to my laptop ports. I also wanted an original OEM made part, the value of my Lenovo laptop is worth more than attempting to save a few dollars for the risk of damaging my investment.
[This review was collected as part of a promotion.] Not much to say except it works perfectly. It is very compact for a 230W power adapter. Using it to power my Lenovo P1Gen5 Notebook and Lenovo hybrid DOCK station as well.
One of these came with my X1 Extreme and I purchased another since I have two locations where I use the laptop all the time. These can put out a lot of power when needed, which helps justify the downsides.
These bricks are heavy. The DC cord from the brick to the laptop is also quite heavy and is frequently in the way, partly because the laptop's power inlet is on one side. The bulbous RFI filter, near the laptop end of the DC cord, frequently gets caught on something, like the edge of the desk surface. Finally, the new rectangular plug/jack arrangement requires more attention than the old round ones. I suppose the flat plug was motivated by the thinness of today's ThinkPads.
One more comment: on the laptop side the power jack is nearly invisible in all but strong direct light. I fastened a piece of white electrical tape just below the jack, cut to delineate the sides of the jack. This allows me to guide the plug into place in normal lighting.