I've used another AI assistant (Voila, bought here on Appsumo) for several years and it's been invaluable. I was looking to increase my efficiency though, and give myself additional perspectives with some more software which ideally would both work in app, and give me acess to (and credits with) other LLMs.
My other AI assistant gives access to ChaptGPT only, whereas Triplo has multiple options to choose from.

It's also great for in-app work so I don't have to open another window when I'm working in MS word, Scrivener or whatever. I use it on my desktop when editing, to improve my writing via custom instructions about my author voice and style.

I bought the level 2 tier which lets me use it on 3 devices. The customizable chat aspect for example on my Android mobile is invaluable too.

Triplo has great instructional videos as well, and it's there where I got the guidence for long form document (ie 'book') editing.

On the customer service front, Felipe's personal help is second to none. One of my very best buys on Appsumo.