I used it consistently for very heavy strongman events. It is great to fire you up and get you going before a lift, I didn't like it for technical lifts, such as jerks, because I found a more lucid state provided more consistent results. If you feel like you need to fire yourself up for your lifts though, it will definitely do that. If you do decide to use it, get a small prescription bottle or plastic film canister. You can bust the ampule in there and then sniff it for an entire work out.
On a side note, if you do use it be careful I think it will gradually damage the sensitivity of your nose. I stopped because I was afraid of harming my sense of smell/taste.