i am currently running "Snow Leopard" would there be any advantage to upgrade to the latest upgrade which is it ? Mtn. Lion or Lion or "Saber Toothed Tiger" ?? 😀
if i were to upgrade do i need to buy a disk or can it be down loaded fromwebsite ?
And, if you do upgrade wait until 10.8.3 is out, also do not use Migration Assistant, better manage yourself.
I wish I could go back to SL, quite a few things which I don't like, too many bugs as well.(10.8.2)
I've not run into any bugs with 10.8.2, what issues are you seeing.

😕If you want to know whether Mountain Lion is for you, then you should read this in-depth review, which discusses all the benefits and disadvantages.
http://arstechnica.com/apple/2012/07/os-x-10-8/