Former and Current Tobira users, at what pace did you go through the book?

After floundering around at the end of beginner almost but not quite intermediate area for far too long, I have finally decided to take on Tobira.

From everything I've read, I understand Tobira will be pretty decent jump in difficulty from what I am probably used to, so I expect it will take a good chunk of time, especially since I work full-time as well. Also, yes, I realize everyone is different. Nonetheless, I was hoping to get an idea how long the rest of you took or are planning to take, in hopes to build a semi-reasonable goal (that more than likely will be adjusted several times haha).

For those of you who used it in school, did it take one or multiple semesters?

For those of you who self study, was this a one chapter a week type thing, or did you take a bit longer, for example a chapter ever other week.

Thanks!