I started out with low cost injectors and have spent more money on junk that broke, cracked, leaked, and clogged. I cooked my first year in comps and broke two injectors.
If you can hold out and save the $50 bucks for a Spitjack you will not be sorry. Easy to use, fill, and clean. Mine is 3 years old and is still in perfect shape and as you might have heard comps are tough on equipment. (Not sponsored by Spitjack)
Paul (Shady Crew BBQ Team)