I used to be an expert in pools

( used to work part time at HTH in my younger days) and looked after my dads pool for years. we had a chlorinator and it was fine, of course since no one looked after the thing after i moved out its not working anymore.
So heres the basic, salt chlorinator (Sodium Chloride) and regualr granular chlorine (calcium hypochlorite) do exactly the same thing, treat your water with chlorine by runing electric curent through salt and spliting the soium frm the chlorine or using the sun and water to remove the calcium in granular - you still need to monitor your PH level and regulate with acid and add excess chlorine to the pool at specific times (after rain, very hot day or after use - these increas chances of pool turning green - if pool is hit by lightening that will turn the pool green almost instantly

)by adding 3 cups of granular or the so called shock treatment or pressing the button on the chlorinator to increas chlorine content.
as for pros and cons.
well salt chlorinator first of all the bigest expense of buying the machine and installing it , runing costs, maintance wise you would need to clean the diodes every few months with pool acid which is cheap and depending on usage throw 2 or 3 bags of salt twice a year which is also very cheap. So con is initial cost, Pro the machine prety much regualtes themsleves but as mentioned above there are times you need to increase output and mainatnce is cheap
as for leaves get one of those pool skim there is a nother one i cant recall the name was a verimark or glomail thing was cheaper but used thin socks that needed replacing quite often
and oh about Blu52 its a peroxide based product so instead of treating the water with chlorine you use peroxide - if bored mix blu 52 and hth in a pool and watch the choas