Poor quality and bad business practises.

Low priced products, basically half the price elsewhere... but the catch is, on average, half of what received didn't work or died within a week.

Try to unsubscribe to their daily emails... they wait while, then resubscribe you again... you unsubscribe... they add you back after a bit again... and again and again and again...

One other thing, their deliveries take a long time to arrive. Always over a month.