Pretty good but the key is difficult
353760
I had a scary time one time because I could NOT get it to open and I was at the gas pump.  A couple people helped but couldn't open it and when I was ready to drive home without getting gas .. one last person, who had one 'just like it' came over and opened it.  After that I memorized the key direction and once you are confident that you have it the right way you just stick with it and it was never an issue.

FiTS a 99 Honda Civic.
4213589
The keys don't always work, you have to press really hard on them to get them to work.  Its ok...
3435569
Has good features, but too narrow focus on chords that may be used in a given key, and no apparent way to change keys
660569
Song selection is great, but I would only consider a third of songs "easy"--some keys are tortuous for me, an intermediate beginner (compared to the Easy Fake Book series books I already own/play)
1598333
Instructions for coding very hard to understand. But once we got over that hump we coded our own key and love the lock. We now have two buildings with the same lock.
4654351
It works well once you get it to work but there is a little trick to getting the hang of this kind of opener.  It is a little on the heavy side so if someone has problems with their hands this might be a problem.  The other "con" is that the little gripper to get a hold of the lid to take it off also takes a knack to get onto it.  If you are visually impaired, like myself, that might be a little hard.
3215659
Very nice heavy key, but no easy way to hang this, it's not flat on one side
1801349
It is not that hard but the syncopation in the music make it difficult to learn. It may take me a year but it will be worth it!!!!
1083386
Got this because I change key rings or rearrange keys and they are easier to use that conventual key rings. Plus, I didn't want to scratch around the key ignition. The only problem is they are hard to open and close.
3053367
I love the soft feel of the keys and the sleek design, but the layout can be a bit odd. The Enter key is shaped really strangely, and it really takes some getting used to. Also, I feel like some of the other keys are in slightly positions, which means you have to get used to everything on the keyboard. However, I only started using it today, and I'm already getting used to it. I'm still happy I bought it.
1287010
I wanted a keyboard which would replace my (very excellent) piano when we moved into a small apartment.  I am not using all the special effects, and probably never will.  I  read all the reviews and chose the Yamaha YPG-535 with 88 keys.  It is good enough, but not perfect.  My main complaint is that when I am stretching to reach a large chord, a couple of my middle fingers hit the dead spot in the back of the keys, and they don't play.  This applies to all keys:  There is a dead spot at the base of the keys.  This is not a problem on a piano.  So if you are just learning to play the piano, the technique will be somewhat different from the keyboard.  I think it is probably very good for beginner to advanced beginner, but once you get into some "bigger" classical music, it requires a different technique.  You have to pull back your fingers to the front of the keys so they will play.  That being said, when I put on the excellent headphones and play, the tone is very good and it is a joy to play (except that I am out of practice and the errors are awful!)  Read the instructions in the manual before you put the stand together!  We didn't find them until we were through!  They would have saved us a lot of time and confusion.  Once set up, it looks very nice, I recommend covering the keyboard with a cloth or something to protect the keys from dust and dirt.  It's not like a piano, with the cover that slides or pulls out to cover the keys for protection.
2242205
The keyboard does what it promises. It's very sturdy and looks like it will last a long time, but I have a few issues with it:

The keys are very loud. Some people disagree, but this is the loudest keyboard I can recall using.
 Another thing that bothers me is that the keys are much harder to press than I'd like compared to previous keyboards I've used. Its a strain on my hands, but they're very small so others may not have the same problem.

Another reason for this may be that it's a fairly tall keyboard with no room to rest your palms, and my hands are forced to be angled upwards. (rather than comfortably above the keys.)

Maybe it's because my previous keyboard was particularly quiet and easy-to-press, but I really don't care for the features of this keyboard. It's just not comfortable for  me.
343891
I would have given it 5 stars, but I am just having a little trouble getting used to the keys being covered on the bottom.  But otherwise it serves it's purpose well.
391057
The keyboard installed quickly.  The illuminated keyboard is a plus, especially when trying to do data entry and the lighting is dim.  The letters are large, which takes a little getting used to if you are accustomed to non-large letter keyboards but that should not influence anyone away from purchasing this item.  The only problem I have is that the keys frequently tend to stick which means I have to back track frequently.  In other words, if I type a sentence quickly, not every key I depress seems to register.  If I try to go slowly, it is better but it slows me down.  It would be good if the touch could be adjusted.
4893712
This was a lot harder than I thought it would be, which was a good thing in a way.  The gears and the way it turns was difficult to wrap my head around at first.  As far as quality, the turning is smooth, but kind of slow.  I wouldn't want to speedsolve this puzzle, but it's not frustrating to turn for a casual solve.  The turning (at least the sides that move gears) is kind of loud, but not obnoxious.  It's comparable to the noise the standard Rubik's cube makes when turning.  The only complaint I have would be the stickers.  From the beginning, I've had a few stick up where I've needed to press them back down on the piece, but none of them have torn or come completely off, which is why it's only mildly annoying.  The color scheme is also different than your standard white/yellow, blue/green, orange/red, but it's not hard to get used to, just messes with my OCD-esque placement of the puzzle on my shelf.
3086154
Difficult to use at first due to the shape and layout but after a month or so I became proficient and move around it faster.  No problems with arm/wrist fatigue and I work on the computer all day.  I do not like the disconnected 10 key though.  I use my right hand for the mouse and the ten key.  One of them is always in the way of the other. Very cumbersome.  Would be 5 star if it weren't for the 10 key.
4301890
It's difficult to press onto keys--you really have to press down hard on it, and it's annoying to do that.