I was able to return that Aria ATU120/6, by the way. I don't recommend it
Well, there will soon be a step-up (hopefully) from GL-1, only twice the price, rather than 4 or 5 times-the Cordoba Guilele ($199), whose availability has been delayed for months, and hopefully will be available soon. The photo looks very similar to the GL-1--likely same body size and scale, but with solid top and bone nut and saddle. Until people try them though, no way to know how good they will really be.
If you would like somewhat larger (so not as cramped fingerboard), but smaller than a guitar, have you considered a requinto? (About the size of a 3/4 guitar, but with full-width fingerboard, you tune it like GL-1, but have to use thinner strings to tune that hiigh on the larger instrument--a requinto string set.
A normal requinto is about 580mm scale, similar to 3/4 guitar. Cordoba has two instruments for sale that they call requinto, but are smaller, in between requinto and guitalele--they call them requinto 480, and requinto 520. (The numbers referring to the scale in mm. (So the 480 is only a little larger than the guitalele, 480 mmscale compared to 440.) (They also have a 580, which is more normal requinto size.) Has anyone here tried one of those smaller cordoba requintos, 480 and 520? If so, please give a review. What kind of strings did you use with it?
You say the strings are closer togetner on GL-1 than a guitar. I don't think so. It appears to have a full-width neck. What makes it feel so cramped is the short scale.
If you can find a Kala u-tar used (discontinued), that is also tuned the same way, but the size of a bari uke rather than a tenor uke like the GL-1. That would also be less cramped for the left hand than GL-1.
I'm with you both Skitzic and Maikii that the Yamaha is a great little instrument. The GL-1 has been great for me to play but it is important to find the right strings and proper tuning. Also there have been two particular difficulties for me, first the height of strings at the nut make it really tough to barre effectively on fret 1, second the strings are just that bit too close together forcing an awkward compromise on some chords. It is though an absolute bargain. I think the next step up that would display a significant improvement would be a Mele or Ortega, so that means around 4 or 5 times the price!
My Yamaha was bought as a cheap 'practice' instrument to help me adapt because in the same week I ordered a Kanile'a GL6. I knew it would take up to 3 months to arrive so I patiently waited and played my Yamaha - then it arrived about 10 days ago. How does it compare? Well it wouldn't be fair would it, they are based on the same principle but so different. The Yamaha though is definitely not totally shamed by the Kanile'a, but the Kanile'a has a very free and open 'voice' while the Yamaha is a lot quieter and kind of muffled. The thing with the GL6 is the increased playing area on that gorgeous neck which stretches out to fret 16 before my hand touches the body, and the resonances that sing through the wood are a delight.
Oh, and I do have 3 guitars but this was all about being comfortable for longer and a full size guitar won't sit in my lap nearly so well while I relax and doodle a tune or three.
With any luck I will try and put a review of the Kanile'a GL6 together if there is interest, plus I will surely have some examples on youtube before long (wish I had a better camera!).