Easy to assemble, but the manual was pretty much useless with tiny postage stamp size photos and English that makes no sense.
The operating instructions were for a completely different LCD controller, and none of the buttons performed as described. I couldn't even get the pump to prime after multiple attempts, and it was very frustrating. Only after finding an obscure video about my specific controller was I able to get the unit primed and started. It works great, but is pretty noisy with the pump ticking and the fan if it's running higher than the lowest setting. On the highest setting, it's as loud as my vacuum cleaner! Bottom line is, for the price, you can't beat it if you can figure it all out on your own.