Our mechanic at the company shop has one very similar to that one. He loves it. I built my own. It works well, but I have learned a couple of things, and if I build another, it'll be better. I use 40/30 garnet @ about 15 bucks for 25 pounds. Maybe they are 50 # bags. It's been awhile since I bought some.
You won't be able to believe how many things need a good blasting, now that you have one!