I bought a new Juki TL98q last summer. I really love sewing on it.
It needs to be oiled more often than my Pfaff domestic. I would say the Juki should be oiled every other month. Since this is partly an industrial machine some of the things that I have found are:
1) The presser feet need to be skrewed on, not snapped on; that's not a big deal if you have an easy time threading that skrew into the hole sideways. I have a hard time with it.
2) to oil, you need to dis-assemble the top plate and bottom plate.
3) Quarter Inch feet with or without the sidebar are not that easy to get. My dealer is more interested in servicing his larger industrial customers. I still don't have quarter inch feet for piecing, but I have found a supplier online and my local juki dealer said I should just buy from him. I thought the TL98Q being a quilting model would come with quilting feet but it comes with a quarter inch free motion foot. It also comes with a quarter inch hopping foot that has a sidebar, but I find it does not do an accurate quarter inch.
So all in all, I really like my Juki for free motion, but it's not as easy to own as a regular domestic in my opinion.