I haven't used it yet. As a retired inspector of all kinds of production goods I can share the following visual observations: The "clamps" are plastic. The portion of the clamp that fits into the holes are appears to be solid. The holes themselves are of a tapered diameter, with the larger dimension being at the top, then narrows down to the bottom. This would be where the "clamping" effort will be experienced. Other users have complained that the clamps loosen and are useless. I can see why, over time and use. For me this is a non issue. I have only one use for this product, to cut bevels into toe kick boards. 4 cuts and I will be done. I guess the saw that comes with it might be of some use down the road. As for the rest of it, I will be careful to not rely solely on the "clamps" to hold the boards in place. In that way perhaps I will be able to extend the life of the clamps for future, unexpected use by minimizing back and forth motion which could cause wear in the hole/clamp interface. I suppose I can use some kind of real clamp to augment or just replace the plastic pieces by holding the boards securely to the box interior. I purchased this product to avoid paying more for more elaborate and more costly table saw for the same limited use project. Since I haven't yet used it, this is admittedly just an observation and prediction supporting others' shared complaints and the sample I have here. Material characteristics of the box might have been changed by the manufacturer to boost the clamping power over time and use. Only one way to know for certain. Just an opinion, not a declaration of suitability. Caveat emptor, as the age old saying goes. And you can apply that to this free opinion as well.
you cant lay it flat in box
use a tape measure and measure the space inside the box
no
No. the box is almost 5" deep but only 3" wide.
depends on angle of cut
Yes. This is a very versatile miter box.
If the baseboard is not wider than the box it will definitely cut it.
No. The max width that fits is 4.5". But if you need to secure your piece it should be 1-1.5 in narrower. You can sandwich clamp your piece between some other straight boards and make your cut using them as a guide.
Yes.