The Asus Transformer Prime.

It was an Android tablet circa 2011, right at that time they were actually making 10" Android tablets. I bought one as soon as Android Honeycomb launched which had an improved UI and lot of new tablet focused features. I bought the optional keyboard/battery attachment and planned for it to be my tiny laptop replacement that could also play emulators and be used for reading comics. I wanted to like it so bad.

It never really panned out though, a large majority of which was because of the faulty Nvidia Tegra 3 chip. Awful performance issues, terrible wireless connectivity, overheating, battery drain and nonexistant software updates from Asus. I ran custom ROMs trying to squeeze it as much as I could but that meant I was constantly tinkering with it and having yet more problems. Eventually I even broke the screen (my fault) and painstakingly went through a whole botched screen replacement before finally deciding that it had been a huge waste of time and money and sent it to it's grave.