I love using these on my 5/3/1 days. I will use them on my plus sets, joker sets, and when going for a one rep max. They are great to get you focused/in the zone for that brief time. The only issue is if you get it too close to your nose or inhale too much, at least for me, my eyes water and that can detract from the lift, but I have used them so much now I know where to put the bottle.
I would go with nose tork. A 3 pack on Amazon is about $10 and lasts a long time.