Well, I love that this serger has a the cover stitch feature and the flat lock feature. Well, I love all the features of this machine, but those just aforementioned more specifically.
Now, this machine is an upgrade from my Brother 1034D (BTW a great serger for beginners or first time serger). I thought threading this machine would be so hard, but its not. Once you read your manual and familiarize yourself with your machine, you are good to go. However, just reading the manual is not enough. You will need to print out the workbook (or, I also view it on my Ipad in color), as the workbook gives you step-by-step instructions for each stitch that you may want achieve. Use your manual to get familiar with the parts of your machine and when done with that, use the workbook to get started.
I haven't tried every stitch just yet- I am basically just using my 4 thread stitch with safety stitch- this is a great feature because you don't have to use your sewing machine along with this feature.
I know this isn't much information, but my advice would be to read your manual to get to know your machine, then open your workbook up and practice the different stitches- this way you will become comfortable with your machine and threading will be so much easier, as it has become with me.
I guess I really don't have any dislikes about this machine. The only thing I totally disliked, but it didn't have anything to do with the machine is: When I got my machine, I unpacked it and set it up and I took my time reading the manual and etc (learning my machine), once threaded it, it wouldn't chain off. After calling Singer for assistance, it was determined that there was a problem with my machine and I had to have it shipped to an authorized Singer dealer to be fixed. WELL, straight out of the box, never used and something is already wrong with it AND not to mention my 90day warranty had expired!!! (i really took my time, huh?) However, because I was only a week past my 90day warranty Singer extended it for me, but that was after my 2nd call in because I was furious that I had spent a little over $500 on a machine that didn't work and thought I would have to spend extra money to get it fixed! However, shipped it to the authorized dealer, it took about 1.5 weeks to remedy the problem, now my serger is working and I have been sewing with it. But, I still live with the fact that a brand new serger had to be fixed before I even used it, this makes me feel a little violated, and does have me on edge when using it, because I'm always thinking I was sent a refurbished machine, but everything is working ok now.
12/10/13- update: I'm still loving my machine, however, I have to admit that I do not like the rolled hem feature on this machine. It simple just looks like a regular serged seam. Also, the stitches with the safety stitch (3 or 4 thread with safety stitch) you shouldn't have to use a sewing machine, but I am finding that the safety stitch is not strong enough.. I've tried to adjust the tension, but the seams still seem to pull away easily. Still learning my machine. I will try my best updating along the way to give others a better review if this machine is on your list for possible purchase.