We recently got a batch of about 16 or so Sharpies. It took us a long time to get them - we had to rent them for a few shows leading up to the
purchase delivery. They are fast, and they are bright. When we do
arena shows, they are the difference-makers because they can cut through and really pop from very long distances. They are super lightweight, and our
road cases hold 6 per case. They are awesome as effects units. I'll take them any day over our other units.
Some of the downsides: they get very hot, and the beam has the ability to set things on fire - hence the minimum 40'
throw warning on all the fixtures. We did have an issue after renting some out where the pan locks were not unlocked when powered up, and some of the gearing was
ground down. Not a fun thing to discover. Also, they are overkill for smaller venues, and when you watch Saturday Night Live, you can clearly see that they are overkill for that particular show because they overpower the cameras for the musical guests and actually negatively impact what the viewer at home sees. However, if you watch wrestling week to week, you'll see a great utilization of Sharpies throughout the show as
ground units.
All in all, they work nicely, if you can get em.