Id never go back to bleach, pucks, or tablets, or floaters unless I'm between dead cells (hasnt happened yet)
It doesnt eliminate a trip to buy pool supplies- you still need to go to a store for "stuff"
You still have to go to somewhere to buy acid, and will likely have to add a little every week, but you'll find that is pretty consistent- for me its about a quart a week. So a 4 pack lasts me 4 months, and I have a spare jug, so when I use up 4 I still have a month to go get a whole "shell" - Much easier than bleach.
I still test regularly though, and find a SWG makes for a more stable pool all around.
You also need to insure you have X amount of flow or they may not function at all- so if you are planning on running your fancy new variable speed pump at 100watts- it doesn't really work, and you definately now have a minimum speed at which things dont work.
I have metal all around and havent seen any adverse effects to any of it for 3 years now. I haven't had any surface issues at all.
As one poster said you are paying for convenience, - yeah and Im happy to make the payment.
Dave