I just got a JR-2 a couple of weeks ago and it is a good little guitar for what it is, an inexpensive solid top over laminate. I wanted it specifically for the scale length at 21 1/4 for practice and hopefully some day travel. The GS Mini was too close to a full scale for me, though it has a great rep. I am currently GASsing looking for my keeper acoustic player (I found the electric keeper, a Peavey T-30).
I got the JR-2 for the solid spruce top and I wanted a tobacco burst finish. It is cheap and looks it as far as the quality of finish, but I got it for $140 new shipped from Austin Bazaar on eBay and it was perfectly set up right out of the box and has good intonation, and the neck and fretboard have a very nice feel. I was pleasantly surprised! After the strings settled in it sounds pretty good, nothing like my Tacoma Papoose (19" scale all solid cedar over mahogany) or a full size but it is very pleasant and is a good little practice guitar if you don't have big hands. It also has a nice body fit for a smaller person, no contortions necessary for me to hold and play it so it's really comfortable. If transitioning from uke it could be a very good start. Then if guitar "sticks" it is still a good travel guitar and you could move up to a nicer all solid or a Taylor GS Mini etc. If money and scale length aren't a limitation then the GS Mini should be a nice starter guitar. I have not played one myself however but was considering one. I just bought another Tacoma, a spruce topped solid 'hog back and sides parlor sized model for the smaller body size. I also have a Tacoma Chief and bought a DM-18 for my husband, but the dreadnaught size is hard for me to get around the body.
What I like about the Yamaha is that the size is perfect for me to learn something on in front of my computer, then when I have it down I can (potentially) transition over to the full size, even though I don't have much reach on the longer scale. The more I stretch on the 21 inch scale the more I can stretch to reach on the full size, even if just small increments. What I especially like is that it is a steel string and ultimately that was the sound I had been searching for, as I have enough nylon and flouro on my ukes. I sold my classical because I wanted a narrower fretboard and steel strings. The fretboard is a hair over 1 5/8 at the nut, my full size acoustics are all 1 3/4.
I am happy having guitars back in my stable, I can always play uke chords on the top four strings and I am not limited if there is a song I want to try for which I can only find tabs or chords for guitar. This is something I want to do for fun, so I am thoroughly enjoying the guitars without huge expectations.
I would note that if you want volume, clarity and great separation of notes and deep bass response, you'll want a bigger bodied guitar. This will sound muddy in comparison though it is a nice little fingerpicker. If you just want to get your feet wet this is a great starter in my opinion. If you want an even shorter scale and steel strings, look for a Tacoma Papoose, I think there may still be one on eBay right now. They are a rare animal but are undervalued for the quality.