Just picked up the Soare CL4+ 500S earlier today.
My summary below after giving it a spin and making measurements without mounting the reel or putting any line on it.
1. This is a proper 500 sized reel. I thought perhaps they would make it more 750 but is a 500 sized reel. For me, I think it would be a fantastic reel for UL braids such as nanofil - plenty of capacity and no memory issues. I do have friends who fish 2 lbs on 500 reels all day but for me, I have always just used size 1000 reels for mono or fluor. I am probably too cautious...
2. One thing I appreciate about JDM is that their specs are accurate. 140 grams turn out to be 139.6 grams per my digital scale. I read (via translation) a Japanese review somewhere where they though it contributed to sensitivity being so light. I'm not sure if I quite believe it will make that much difference but it is nice to find a reel of this quality breaking the 5 oz barrier. (4.9 oz).
3. Smooth and tight - a touch tighter than the Luvias 1003 reels that I run with when those are new out of the box. I can feel the grease in the body I think. Taking the drag knob off, it is also well greased. The knob on the handle definitely is tighter than the Daiwa Luvias series. That's what I noticed most. I've had a bunch of Daiwa 1003s including Presso, and also the TD Fuego 1000a. All of their knobs have a bit of play that this 500S does not have.
4. Drag - smoooth and gives easily. Adjusts linearly too it feels. Clicker sound when I turn the spool against drag is crisp but not quite what I am used to with the Daiwa 1003. The Daiwa is more bell like sounding which I have gotten used to. (I've never actuall ever owned a Shimano reel - this is a first one.)
In short, befitting a JDM reel though not as nice as a Daiwa Exist that I had a spin of recently. Of course the Exist is more than double the $$$
If I was willing to go with a 500 sized spool, in my mind, this is what I would use.