I used to be a heavy user of my Psion Revo back in the 2000s. It had a highly usable full-featured office suite, and I truly used it as a laptop replacement at the time. I was able to touch-type my university course on it, and it could even fit a shirt front pocket. Honestly, the only thing that quickly made it obsolete was the lack of network connectivity (limited to infrared). It's still one of the computing devices for which I have the fondest memories.
If I'd had better connectivity for my 5mx at the time, I don't think I'd ever have put it down. Phenomenal piece of kit. I don't even remember it being that expensive.
