I did get my PX-730 delivered last week

Unfortunately I wasn't able to play it to my heart's content yet because I can only play it at weekends and I was busy these past couple of weekends. I've played it enough, though, to make an initial review:
No problems so far. I don't have problems with sticking keys or such. Everything was working perfectly. I don't know if the keys came with blue tape on them since I wasn't around when it was delivered. The delivery guys from Casio set it up and I'd say it was set up quite well.
Keep in mind that I also own the previous model (PX-720) which is my main piano so my comparisons are based on it.
I think the PX-730 is a big improvement over the PX-720 model. For one, the keyboard is much better. Though I've never had problems with 'clacking keys,' it seems Casio has addressed the issue. I don't notice the 'clacking' on my PX-720 unless I
really paid attention, but I can see how it might bother people who may be more sensitive to the key noise. In contrast, the keybed of the PX-730 is significantly quieter, even with the DP turned off. Probably, anyone who would think the new Privias have noisy keys would think that all DPs have the same problem.
The keys are much more responsive too, and much easier to play. It was one of the first things I noticed about the PX-730. Much later I realized that the sensitivity can be customized (1 to 3, with 1 being the most sensitive) or even turned off. This was not a feature on the PX-720 and was a pleasant surprise. Another thing is that you can feel low-level vibrations on the keys. There's no vibration on the PX-720 because the speakers are separated from the keyboard. The PX-730's speakers protrude on the underside of the keyboard, which is why I think the vibration from the speakers travels through to the keys. I find the speakers strange-looking, though:
The speakers are OK, as I am not asking for the moon and the stars from built-in speakers. Though only 8W x 2, I don't feel they are underpowered because our living room isn't big and I never even play with the volume over 3/4 of max.
I like the new look of the keyboard. The red felt is a nice touch, while the brushed metal on top of the keyboard not only looks much better, it also improves the readability of the functions assigned to each key. I didn't understand the logic in the PX-720 when they did away with NOT labeling the functions assigned to the treble part of the keyboard (you had to look in the manual and memorize the key assignment), but thankfully that has been rectified on the PX-730 and all the keys have their function labels indicated on top.
The main control buttons look mostly the same as before but there's an additional piano voice and a bunch of other functions assigned to the buttons. The PX-730 also has a few more voices than the PX-720. Additional voices include strings 2, jazz organ, elec piano 2, and probably some more I can't remember. I don't know if it's because of the speakers or my ears playing tricks on me, but I like the modern piano voice in the PX-730 better than the PX-720. I like a brighter sound so it's the one I always use.
One thing that I am not happy about is the music stand. It's the same as the PX-720, only now in frosted smoky black instead of frosted clear. It's the same flimsy plastic, about 7 inches tall. The music stand on my PX-720 is still fine, but I am always worrying it might crack one of these days. I'm careful not to leave heavy books leaning on it. And 7 inches is too short to prop up music sheets without something stiff behind them. I do find it aesthetically pleasing and in line with the minimalist Privia look, but I wish it was sturdier and more functional! I recommend a model with a sturdier music stand if you know the piano must handle rough treatment (by kids!).
The pedals are the same as before. Though compared to the Celvianos and other acoustics I tried, the pedals are on the short side, but it's not a problem for me. I reckon there are as many variations in DP pedals as there are in real pianos.
One major difference is that the current generation scrapped the MIDI ports for USB ports. Very convenient, since you can connect the Privia to the computer and the computer will recognize it as a drive. You can copy and write midi data directly to and from the computer. Only the PX-330 and Celviano AP 620 still retain the MIDI ports.
Overall, I'm happy with my purchase even though I wasn't able to get what I really wanted, the PX-830. I sacrificed the key tops, the SD card, and 20W x 2 speakers for a lower price (and the PX-830 wasn't available where I am). I realized I could live without those and still be satisfied. And my wallet is thanking me too

The Privias are the best bang for the buck for those on a budget!