The most important thing about this kind of webs is the support. Most of them don't have any and in case of a problem you are going to receive no answer at all.
I can say the support works perfect, and the key too.

Perfect, works great, love it.

Just bought office 2021 key and it worked like a charm!

Appena comprato avevo già il codice nella sezione "Order history". Attivato su sito ufficiale Microsoft ed aggiunto immediatamente al mio account.
Pagato con paypal, quindi sicuro. Ottima esperienza.

Works like a charm and fast delivery!