I"m a real wuss when it comes to using table saws. And, I've used them a lot, and continue to. Those lightweight portable saws are an expedient that should be avoided if you have the space to set up a better saw. They are inherently not as safe as a large, heavy saw, because they can move and bind the board easily. For the same reason, it's hard to do quality work with one.
At my last shop, I had a heavy, custom made saw based around an old cast iron Craftsman that had considerable upgrades and a 4 x 6 foot top table. It weighed upwards of 900 pounds. It had came out of a cabinet shop, and I used it to make custom oak woodwork for the house, and cabinetry as I built the house. After I completed the house, it was really in my way, so I thought I would replace it with a portable contractor saw. I bought a Bosch one, at about 2.5 times the price the ones you are looking at cost. I got a good deal on it used, but in new condition from a retired guy that thought he would get into woodworking and didn't use it. I made exactly one cut on it, and decided it wasn't stable enough to do good work safely, and sold it back off. I bought a slightly better Ryobi, and it was acceptable, but still too light to do good work. When I moved, I sold it off, and knew I would replace it with a cabinet grade saw.
I am building a house at the moment. I bought one of the pretty standard 10" cast iron top with sheet metal extension Craftsman saws to use as a construction saw. It does the job better than a portable, but is still not rock solid. Again, the saw can shift, and cause the board to bind, either making the cut not perfectly straight, or binding the board and causing a kickback. It is okay for rough framing work, but not suitable for cabinet work. I have purchased a used Delta 3 hp unisaw to use in the shop when it's completed. The Craftsman will go down the road, as soon as we're done ripping another dozen framing boards for trimming out the siding.
Having owned over the past 35 years 2 unisaws, a custom setup Craftsman saw, two Craftsman 10" standard saws, a Delta Contractor saw, a Ryobi portable and a Bosch portable, I"d say that the minimum level I would recommend is one of the Craftsman or Delta Contractor saws or similar for standard work, and if you want to do quality work or cabinet grade work, you need to have a lot more weight and stability in the saw, either by adding on to and tuning up a standard saw or by going with a cabinet grade saw that weighs in excess of 350 pounds.
The lightweight portable saws like you referenced are intended for jobsite use, ripping 2x's or sheet goods for rough carpentry. They're not real precise or suited for better quality work. If you want the saw to just work on framing stuff on your house, it'll do. But, if you want to do quality finish work, you need a better saw.
Good saws are available used for reasonable cost quite often on Craigslist. Watch there, and you can get a much better saw for the price of the ones you referenced. It will be much safer if set up correctly, and do better work.