Hi,
I bought a SIP sliding mitre saw about 6 years ago, not sure of the model number but probably not made now anyway. It's a 10" saw sliding on twin rails. It has been OK, but there have been issues. The laser stopped working and then the bevel scale came off (just stuck on piece of plastic) so it doesn't look like it's made for professional use, but OK for occasional DIY people like me. The bevel and mitre settings can be adjusted to maintain accuracy. It recently played up - the blade didn't stop when I released the trigger and black smoke appeared. I pulled it loose, couldn't really see what was wrong but on reassembly, it worked. However the blade doesn't stop so quickly so I'm guessing the smoke came from an electronic blade brake of sorts.
Overall, it was a good buy for the price (for me at any rate) but I was disappointed when I thought it had burned out after not a great deal of use. I still use it, without the blade brake - doesn't worry me.
One issue though is dust - there was a bag supplied (waste of time) and even a dust extractor connected to the guard port leaves loads of dust around the place. A rear dust collection system is really needed.
K