A red dot won't allow precision aiming to the degree of a telescopic sight, but they're leaps and bounds better than open sights.
As long as you have the mount available, it'll treat you just fine.
I prefer open type red dot sites, don't really like tube style. There's not much advantage to tubes over open style for precision, but they do occlude a lot more of your field of view, which isn't great. Burris FastFire III, Aimpoint, or EoTech, take your pick for a rifle.
I do have one of the Bushnell Trophy 1x28 tubers, a Bushnell TRS-25 short tubers, and a Bushnell AR 1x bell style tuber. They're reasonably good quality, clear lenses, hold zero, sharp reticle dots. But I'd rather have a Burris FFIII in general.