We purchased our Jacuzzi 365 in April, installed mid may. Zero issues so far, its not the 325 you speak of but the same brand, in our searching we liked the Jacuzzi tubs the best. I also installed my tub on spa pads, no issues at all, super easy, clear out the sod, put a bit of a base if needed (they say you dont need to but depending on how level you have to do some leveling anyhow so a bit of crushed gravel is not to bad.
Only thing i am not 100% sold on is the proclear chemical system (Nature 2). It seems simple but i find i actually mess with the water more with this then i did in my old tub with Bromine. But the jury is still out, the wife likes it as there is virtually zero chemical smell.
Overall been happy with my Jacuzzi brand tub so far, and we have a great dealer.