There is no simple answer, as new pilot aptitudes and inherent abilities are wildly variable. Some folks could learn to fly in a few days on a pattern plane, while others take two or three years flying standard trainers.

IMO, as a primary trainer, the Avistar is a hot ship. While, it can be desensitized substantially & will do the job for a broad spectrum of students, it is not for everybody.

Those who can live with it until the survival mode has passed, have a wonderfully responsive and adaptable airplane that should stay in their hangars forever.

Those who struggle a bit can look forward to the Avistar as a super second airplane -- again, one that should always be retained for future use.