WORTH IT! We use our laser in the garage. No window to exhaust through, door is too far away, and I don't want to always crack the garage bay door.
Enter - the Smoke Purifier. I use this in conjunction with the Enclosure (also worth the money). With the two, all (yes ALL) the smoke is eliminated, and the odor is probably reduced to 20-30% potency than without - which makes the garage habitable even while in use, and all the doors closed. Cotton filters wash easy. When used with the enclosure, I don't need to put the Purifier past 20-30%, which keeps the running volume down while doing other tasks.
Yes this thing is pricy, but I don't think we'd be able to operate without it.
*Using with the enclosure does cause some flex in the enclosure.