Looking at my response, I didn't actually respond to your SWG question. Just the part about reducing your work. SWGs have a lot of up and downsides, although in general, people here seem to view the upsides as being greater. I've been considering adding and SWG so far these are the upsides and downsides as I understand them.
Upsides
Adds Chlorine automatically - This is the big one. You no longer have to add chlorine for routine pool use. You still have to test and add supplemental chlorine at times (shocking, etc.)
Cost - This is and up and down side, see down sides below. There are numerous posts here that discuss the overall cost of and SWG and it works out to be similar to liquid chlorine (Bleach), which is generally considered the least expensive method.
More consistent Chlorine Another big plus. Since its add chlorine so slowly over time, you don't have a large spike in chlorine that falls over time like you do with a once a day addition. All chlorine dispensers have this advantage (pucks, liquid chlorine etc...)
Subjective water feel Many people claim the water feels nicer when useing an SWG. This is generally attributed to the salt, which you can add without the generator.
Downsides
Initial Costs They are expensive up front. Most tend to be around the 1k mark for a pool my size.
Replacement Cell Costs The cells do have a life span and do need to be replaced. Cells are not cheap most of the ones I've been looking at are around $400. Again, the net cost works out to something similar to bleach, but its like buying 3-7 years of bleach all at once. And if you don't budget for it, it could definitely feel like a downside
Raises PH This is a side effect that everyone seems to struggle with. Jasonlion, has some up with some great guidelines to help mitigate, this effect. (lower TA + borates) But something to be prepared for.
Complexity For someone who likes to tinker like me this is almost and upside. But I list it here because if something goes wrong, your pool is now a bit more complex and troubleshooting can be more challenging. Additionally, during the troubleshooting phase, you may need to manually add/supplement the chlorine.
I hope that helps