I don't think I've ever been as excited when I first got this. It was my first synthesizer and so I've loved and cherished it since day one - suffice to stay it's still in once piece and working like a charm.
It's called a 'Micro'Korg for a reason; it's a diddy keyboard. If you suffer from stubby fingers than you're going to have a hell of a time playing complex bars, but upon saying this, the Micro's charm is that it's not a workstation or even full-fledged keyboard.
What it lacks in size has merely been squashed into a portable, compact, power-friendly and light slab. Features such as the appegiator help with complex time signatures, while the banks of pre-set synths are stored under genre and number. The 3-digit display is slightly limiting, but heck, the very first VHS recorders were worse for trying to spell words...
The key's don't have too much initial response due to their small profile. In fact, pressing them feels like a toy due to their lack of hammer action. It's in the MicroKorgs nature to feel fun though in operation, yet this doesn't detract it from being a professional keyboard. Many bands gig with it, and even at University, 4 of my friends owned the MicroKorg - a sign of quality over brand.
The reason I say this is because of the lack of true modelling synths on the market. The Roland SH-201 is a good contender, but limited in sound. And aside from the SH-201, the likes of Roland sadly now only offer patch-filled contraptions. One, stupidly, called the Juno G! No resemblance to its formers...
MicroKorgs build quality would be about a 7/10. Although the design and features are gorgeous to look at, some of the quality perhaps isn't as expected for an expensive instrument. Upon saying this, the wooden panels are indeed wooden, and all the knobs/buttons are extremely resistant and well made.
If you're after a good old fashioned modelling synth in a patch-era of instruments then look no further. The lack of blank-banks for storing sounds is disappointing, but adds to the joy of overcoming problems. If you don't appreciate the art of modelling sounds and modifying, the MicroKorg will only dissapoint you.