those miniature ones are usually limited to PLA only and usually don't have low quality extruder (so you can't expect very good print output quality).. high quality extruders are usually tad bigger and lot more expensive so ppl usually don't put them on low volume printers..
the only high quality printers that are small are the kind with resin and laser (SLA printers) but they are kinda expensive (you can see list of 20 best ones here
https://all3dp.com/1/best-resin-dlp-sla ... thography/ )
you might want to check out
https://all3dp.com/1/best-resin-dlp-sla ... plicator-7
4.7 x 2.7 x 7.9 in³
from the miniature FDM printers UP MINI 2 COMPACT
https://hobbyking.com/en_us/up-mini-2-3 ... -plug.html is the only small one that have great print output quality. The problem is it's not open in any way .. closed firmware, you are limited to teartime slicer (that's really really great) etc.. anyhow their line of printer (teartime, UP this and that) are made for non professionals / regular folks, so they "just work" and produce great output.. they are tad on the expensive side but this mini2 is cheap 'cause of the very small build volume...
the other "mini" ones I tried
fabrikator mini v1.5
https://hobbyking.com/en_us/fabrikator- ... -v1-5.html
fabrikator mini v2
https://hobbyking.com/en_us/mini-fabrik ... -plug.html
v2 is tad bigger and lot better (v1 is acrylic and I personally hate acrylic builds 'cause they crack over time, v2 is sheet metal), price is more/less same
v1 is ~15x15cm (so less then A4 paper) footpritn but is bit heigher then a foot (22cm height)
v2 is ~17x18cm (again less then A4) footprint but even more height (27cm)
they are cheap as dirt
you can see a few reviews
https://www.youtube.com/watch?v=oohJIaQDic0
https://youtu.be/syoDDbcTnSA
gcodestat integrates with Simplify3D and allow you to
Calculate print time accurately (acceleration, max speed, junction deviation all taken into consideration)
Embed M117 codes into G-Code
Upload your G-Code directly to Octoprint
open source and unlicence