Compared to a number of different mini PCs that I have, including a few different models from Beelink, the U55 is both expensive and slow. Performance pales in comparison to mini PCs with an Intel Celeron processor, opposite to what I expected from the Intel core i3.Multitasking is cumbersome, start up times are insanely lengthy even after disabling startup programs. This runs counter to what  I experienced using an almost identical mini PC (also Beelink) which differed only in its use of the seemingly lower grade Intel Celeron processor.In addition to the processor's poor performance, I experienced issues with the integrated graphics driver as well. Issues presented themselves even with only monitor connected to one of the two HDMI ports. The monitor used was a 1080p Lenovo monitor, capable of up to 240 Hz refresh rate, which is selectable down to 60 Hz. This PC refused to comply with a refresh rate above 59 Hz, which is unacceptable for a low resolution 1080p display output. Not only did it fail in terms of refresh rate, but the driver itself would randomly flicker at times, even after removing, uninstalling, re-adding, updating or reinstalling the graphics drivers.These two things were significant enough to dissuade me from using this miniPC, in leu of using one of the other Celeron based miniPCs that I have.You're paying a premium for an Intel Core i3 processor, but the poor implementation results in performance easily beat by a lower grade Celeron. Save your pennies, choose one of those instead.