I taught in jacket, back inflate, and BPW. No student ever had an issue with the gear I was in. A thorough debrief on the surface of whatever gear you are using and a relaxed, unrushed pool session and there will be no issue.
Open water dives I always took a BPW because on checkouts you shouldn't be demonstrating what you want the student to do. You ask them to demo the skills.
On some OW dives I used sidemounted lp50s.
If a shop requires you to have some certain type or brand, they should supply it. AT NO COST TO YOU.
If they don't, that says they don't care about you other than being a walking uncompensated advertisement for them.
Open water dives I always took a BPW because on checkouts you shouldn't be demonstrating what you want the student to do. You ask them to demo the skills.
On some OW dives I used sidemounted lp50s.
If a shop requires you to have some certain type or brand, they should supply it. AT NO COST TO YOU.
If they don't, that says they don't care about you other than being a walking uncompensated advertisement for them.