samdweezel05
ArboristSite Guru
The only disadvantages are cost, weight and possibly repair parts if you get a real old 120cc saw.
Before I got my 088 (with 36" bar, chains, an Alaskan Mark III, and boxes) for $450 I saw little use for one. My big trees are on the order of 30" DBH.
It's nice to have, but I couldn't justify buying one at even near full price.
It makes a REAL nice sound when I idle it with my 2 660's.
It's like a top fuel dragster sound.