With or without a host kit: what changes
There's no universal figure to give here: the effect depends on the property and the host. Here instead is what concretely changes, situation by situation.
Guest question about Wi-Fi
Without a kit: a message in the middle of the evening, an answer you have to dig up from memory. With a kit: the code is in the welcome booklet, available without waiting for a reply.
Item left behind by a guest
Without a kit: a message written in a rush, sometimes clumsy. With a kit: the message template is already ready, personalised in thirty seconds.
New cleaner
Without a kit: verbal instructions, risk of something being forgotten. With a kit: the checklist is handed over as-is, nothing explained twice.
Writing a new listing
Without a kit: a blank page, risk of missing an important point. With a kit: the template reminds you of every section to fill in.