Tascam DR-40X

Great sound, and that is the most important thing.
The handling (using the instrument) is mostly intuitiveafter I played with it for 30 minutes.
It has all the features I need, except an internal Litium battery with ext. charger. I can record high quality for days and days on just one inexpensive memory-card, but with the 3xAA batteries it will run out of power within one day! So be prepared and always start with fresh battaries.
The built quality is okee, but I guess when accidently dropped the case can be damaged. But well, dropping condensor microphones is a bad idea anyway. The two metal brackets will protect the mikes somewhat I think, so folding the mikes inwards when not in use is a good idea. Would be nice if the unit would come with a soft pouch, but that is an option.

I'm a professional sound designer, and tend to record both loud and quiet sources for processing.
This recorder is super handy to have if you're on-the-go and tend to record loud sources. I recorded some of my best airplane sounds with this!
That being said, quieter sources become an issue due to the signal-to-noise ration. If you need to pump up the gain considerably, you can expect to hear some self-induced noise, which can be problematic. Sure, noise profiling and filtering is a thing, but that will inevitably affect your processed sounds.
As for the build, it is somewhat plastic-y but solid enough to carry around in a bag without breaking anything.
I can definitely recommend this one for louder sources!