I had a salt system put in this winter - BEST thing I ever did. I paid about $1K, they have come WAAAY down in price. Now my pool guy comes once a month and charges me $25 each time. No more chemicals, no more shock, no more floating tabs. I used to constantly watch my pool and still always had problems and every time I came home from a week away I always had a green tint. Now I've been on a 2 week vaca, two 1 week vacas and several small trips - crystal clear.
I also found that rather than buying big things at the store, often the "pool guys" get you a way better deal. I'm switching out DE for cartridges and my pool guy will save me $400.
I use a Hayward Vac which breaks all the time but its super efficient. I think that G4 is better from what everyone tells me but its big & ugly & looks like a mop in my small-ish pool. Edit - I've been told that now that the pool is more stable, the Hayward should be as well. We'll see.
Thats about it man - I love this salt system so far. The systems seem way more stable than just a couple years ago and for much less. I paid $1,100 installed with all the startup salt.