I just received my Joncutter g5800 a week ago, changed the rim sprocket to run the bars and chains I have for my other two Huskies and finished up a downed tree my husky's couldn't and man, saw is a beast. I am a bit shocked, but it works as I have read on forestry forums and arboriste site.
I have a 15 year old husky 350 that has been a good saw even though they where known to have parts issues, Also have a 572 xp that runs strong I got for a few slab ideas I had. Also have a less than a year old 550xp Mark 2 that has been a pos right from the dealer, has spent total of 4 months in their shop (warranty, E&E equipment Azle TX) and they haven't addressed the problem correctly yet! at this point I wouldn't take them a bicycle for repair. Going to give another warranty service a try and hopefully they are on the ball and know their equipment.
I think thus far, finding a good saw shop is as hard as getting a good saw, I should have known the 550 had troubles since the complaints are easy to find, I suppose when you have to make a "mark2" you had enough issues to clarify a name change idk
I paid $160 from US dealer on Ebay for the joncutter and compared to the 550 it runs away. Looks alomost identical to my 350 and some 450's I have seen,,clone? No doubt