Yeah, I saw something about an SWG in the signature after I posted my response.
As long as you are careful not to let the CYA get too high and to manage your water's stabilizer level, there's certainly nothing wrong with using pucks. They are quite acidic and will lower both the pH and TA. People that use pucks all the time and without testing often wander into to TFP asking why their pH test shows yellow even after adding pH-UP chemicals. When they check their TA, they see that it is basically 0 and their pH has crashed as a result of continuos trichlor use. So, as you can imagine, using trichlor does come with the cost of additional water management.
Honestly speaking, I have no use for pucks. I keep my pool running all winter and when the temperatures drop below the point at which the SWG will work, I simply use bleach (and very little of it) to chlorinate. I've never had any need for anything else.