The Good and The Bad
My church purchased this piano about 3 months ago to replace an OLD 67 key, organ touch Casio that was just bad. After reading a lot of reviews for several different pianos on various websites, we decided to pull the trigger on the PX-350.
This piano sounds are very nice after a bit of EQ. We don't use the organ sounds much. The synth sounds are pleasant and have a wide variety of tonal characteristics for multiple genres. The string and pad sounds are OK at best. When using this piano through a PA mono (which is how a 'stage piano' will be used 99% of the time) the low end on almost every patch has a very noticeable pulsing sound at about 80Hz and below. This drives our sound tech CRAZY. I suspect (and this is only a guess) that all the patches are designed to be stereo and the 'pulsing' is a result of mono summing.
Weight, Touch & Feel:
The overall weight of the keyboard is extremely 'gig' friendly. Very light and compact; easily fits into the back seat of a car. That being said, the piano is not very deep and has a hard time sitting correctly on a standard piano stand. We had a carpenter in our church cut us a board that is about 14" deep and the same length as the PX-350. We set the board on the stand, then the piano on the board to keep the piano from sliding around. The weight of the keys is nice and feels as natural as semi-weighted keys can. For some reason (and I'm still trying to figure this one out), instead of a smooth plastic finish on the keys like EVERYONE else has, Casio decided to imprint the keys with a 'wood grain' pattern that feels awkward and extremely unnatural to play! Myself and the other pianists at church have had tough time adjusting to it.
Too many buttons! When we first opened the PX-350, my first thought was "Crud! I'm going to have to spend an entire afternoon just reading the manual!" You cannot create presets and assign them to a punch button. You can store them in a bank, but you must hit the up or down arrows and scroll through every other sound in a bank to get to the one you're looking for. Layering sounds is quite difficult and NOT something you can do on the fly in a live situation; we tried and it went horribly wrong. While there are a lot of sounds to choose from, most of them are not realistic enough to be used in a live situation. There are buttons for all kinds of recording, playing, drum beats, and everything else you can think of; most of them completely useless for a live playing situation. I suppose if you're a one-man-band, or a solo artist you may find these useful.
Overall, this is at best a PRACTICE piano, not a professional stage piano. Ultimately, our church is in the process of building a new building and we will keep this piano as a backup or put it in a classroom. When it comes time to buy another, I imagine we'll go with a KORG, Yamaha, or Roland.