I searched the archives here and didn't find any feedback on these items. Searches show that solar covers tend to work, and that clear reflective are the best.
These are a little more affordable, and they are easier to take on/off, plus if someone falls in, they don't get wrapped around the large cover.

Although less expensive than a full cover, they are not cheap. Anyone have experience with them? My pool's average temp is about 75 deg, I'm only looking to increase about 5 degrees, but I'll take more if possible.

Some details: inground gunite pool, approx 25,000 gal, partial sun throughout the day, mostly shade.

Any advice/feedback is greatly appreciated.

My only experiance is with a spa we had that we used as a pool for the kids. I tried a couple of the "solar" covers and nothing worked. Most of the reading I came across tended to agree. I currently have a swim spa with 4" solid covers, this works great but only as a means to keep the heat that is pumped into the pool.

I had a 16 x 32 pool in northern VA, and used a full solar cover with a reel (essentially a large sheet of heavy duty bubble wrap). It worked great - got us from the low to mid 70's to a comfy low 80's. The biggest benefit seems to be that you don't lose all that heat overnight. They say there is also a savings in chemicals since the pool is covered most of the time. When it got old, brittle and torn, I bought the solar circles shown in your pictures. They did almost nothing, and frankly, were a pain in the butt. By the time I bought as many as I needed, I'd spent almost as much as a new solar cover. The magnets do not work, the circles fold over in a breeze and flop onto each other too, you get bugs and leaves on them and under them, a real nuisance all-around. You have to pull them off one by one and flop them somewhere before you can swim. I would not buy them again

Thanks for that reply. That is great info. I was starting to consider buying them just to see what would happen.
Did you have any heating equipment? Or did the old cover add 5 to 10 degrees alone?
Also, did you have a diving board? Not sure how I would work the cover and reel with a diving board.

I did not have a heater or a diving board. Yes, a reel isn't small!