This is a decent quality Makita tool and it performs fine within the limits of abrasive cutting.  Stick with quarter inch bar and angle stock, half inch square and round and you will be happy.  Larger stock will have you watching sparks for a long time.  If you have to make a lot of angle changes on the vice and backing plate you will be cursing the design that requires two bolts to be loosened and the poorly marked angle marks - a tooless design would be a vast improvement.  This is a good tool if you only cut small stuff or if you aren't making a lot of cuts.  If I had it to do again I would spend the $400 for a cold saw.