To put it bluntly, I feel like the LX1500 was built down to a price. There's the power cord using #16 wires instead of #14, a 15A breaker instead of the breaker that matches the cord, surge-only outlets built like an afterthought, no EMI filtering for attached devices, LAN surge suppression done in the cheapest way possible with minimal concern for signal integrity and the same for coax protection.
On the plus side, the main reason most people buy a device like this is for battery backup, and in that department the LX1500 delivers: good batteries, good waveform (as far as modified sine waves go) and a status display that covers the essentials. Some people may take issue with Su'scon capacitors, but the brand does not appear to have been involved in notable capacitor failure events since 2006, so I'll take that to mean its capacitors are alright when used correctly, which seems to be the case here.
Would I recommend this UPS? Only, if you do not mind writing off the coax surge protection and possibly the network protection too. What do you, the readers, think? And what would you like to see us tear-down in the future?