I have one as well and I love it! I got mine in late February 2020, just in time before the lockdown and subsequent run on sewing machines. At the time I was able to go into the shop and try out my shortlisted machines. You might not feel ready to do that, I know I'd be wary. It was very useful and helped with my decision.
It is a very solid machine and, as
@KayK says, it allows a lot of user control of tension etc. The dials to scroll through the various modes and menus are much easier to use than a touchscreen. It feels like a 'normal' machine. Luckily I like the way it looks, it is more like a traditional machine, but then I have never had a modern-style computer machine and I've never adjusted to that style.
It comes with a lot of bits and pieces. I got a couple of extra feet thrown in to the deal as well. The knee lift took a bit of getting used to, but now I wouldn't be without it and I've developed a serious leg twitch when using my overlocker! I use the HP foot and throatplate a lot. It's easy to change to the standard plate when necessary. I'd like to try the extension table if I can make space for it.
It's a fast machine, yet very controllable. There is a sliding speed limiter, but the (large) foot pedal is so responsive it isn't always necessary.
There are some very useful youtube videos about the 6700p from
Montaville sewing which I've found helpful.
I had a bit of bother with the threading to start with. I had become so accustomed to threading my old machine that I was rushing through in my usual way. After a couple of 'emergency stops' I learned to take more care over the threading and all has been well since.
I have not regretted my decision at all, I'm delighted with my machine. We seem to 'fit'.
Any questions at all, just ask!