WOW! where do I start with this one. This machine is AWSOME! I can't believe the sound quality of this board. Casio finally put out something worth buying...:) When I first saw this board I was amazed at how it looked, I then saw the maker and was a little leary about it .... I got this board just over a week ago, and boy am I glad I did. I've been playing for over 20 years, and I have a lot of top line workstations from Yamaha, Korg, and Roland.. This Casio dominates the market in regards to features, and sound quality for this price range. The sounds are WAY better than the traditional Casio's. Before I got the MZ I was considering the Yamaha PSR-740... Man I'm glad I didn't get the Yamaha. The only thing the 740 has on the MZ is the vocal harmonizer,(but not everyone needs a vocalizer) The Casio does allow you to run a mic through the system and use the onboard effects to proccess your voice... It sounds good too and the mic has its own volume control.. The sounds are just as good if not better than its competitor the PSR-740.. Both have their good sounds and both have their bad sounds. The MZ has the edge on the 740 because it has a synth engine. If you don't like a sound you can tweek it and edit its parameters. With the 740 your're stuck with the preset sounds. The MZ's sequencers are awsome, and the 740 can't even compare to them. The 740 has direct disk recording and NO internal memory (except for the pattern sequencer which isn't very big) The MZ has a 17 track sequencer that holds 40,000 notes and a pattern sequencer that holds 22,000 notes. Plus the MZ can store 10 patterns and 10 songs in memory. Big plus over the 740 which can only hold 3 patterns and no songs. The editing features on the MZ sequencers FAR exceed the 740... It has in depth mixer settings, and even editing as well, plus better quantizing. The MZ's speaker system also blows the 740 out of the water.. The 740 is only a few watts, and the MZ is 15 watts. The speakers put out a lot of bass. If you own the MZ take a look under the board and you'll see why the speakers sound so good.... The construction and quality is far better on the MZ. Its more solid, and the keys are better too. The action makes the 740 seem like the cheap casio line. Plus the MZ has aftertouch and the 740 doesn't. The MZ's screen is also much better. It's just like the screen on the PSR-8000, 9000, and 9000 Pro. The DSP effects also surpass the 740. There is also stereo line in jacks on the back to run external sound sources through the MZ. Over all it's just a better board... Before I forget both the MZ and the 740 have digital drawbars, but the MZ takes the cake on this one because it has sliders on the face of the board.. You can adjust settings on the fly, and store more drawbar settings in memory. Last but not least, what I feel is VERY important. The MZ is battery backed internally.. You can hold 10 songs 10 patterns, custom voices and other settings in memory, and them turn the power off AND unplug the board and not lose anything... With the 740 you unplug you lose.. bottom line... In my opinion both boards are good.... They both have good and bad points, but in terms of sound quality and features for the same price range the MZ has the edge on the 740.. I think it's a must for anyone who's serious about arrangers...