TL:DR i love it. Just have some issues/questions
I have owned the prime 4+ for almost a year, before that i owned a pioneer rev1. I currently am a bedroom dj with some stuff on youtube. (DJ FF06B5) i switched decks because i thought 4 channels was more suited for my style of playing and i was bang on.
Hardware
Lets get one thing out of the way, i love the deck. If i had to make a complaint it would be that the sliders feel a bit cheaper/flimsy compared to pioneer decks i have tested at stores. Very small issue and when handled with care is not noticeable.
Love the album artwork on the deck, a huge help for me!
Being able to switch view style with a press of two buttons from 2 decks to 4 is such a smart option!
I am very heavy into the loop function and it does not disappoint. I love the loop knob and can not live without. It just naturally works so well.
The sweep fx are awesome! I dont use the fx up top as much but if i had to say something, i wish switching fx was a faster process. It just feels slightly laggy when dialing through them.
As for the on board os it has done wonders. I use the sync feature quite a bit(live or die by that feature i find) . I do wish since its a stand alone system firstly that i could do more in it without my pc. Like when i hold my finger on a track to bring up info, i wish i could customize from that menu. Like hold shift and add notes, or add stars, instead it just seems like i can only look at the information.
One thing i notice is sometimes when i load a new track i hear a slight drop in audio, almost like the system is being over taxed.
I will point out at the start i did use just a usb stick but with recording and going through my tracks it was slow and sometimes stopped recording because i was asking too much from the usb. I ended up getting an ssd which i highly recommend doing. Scrolling through music is a lot faster although not perfectly smooth but oh well.
The main complaint i have with it that i originally bought the deck with an Amazon subscription thinking i would not need to buy music. Boy was I wrong. I found the amazon was slow to load/scroll. I would take 15-20 seconds to download the song, then another 10-15 to analyze. Does not really work with my style of playing. Also there is a 2 track limit at once for amazon which is crazy on such a beautiful 4 channel deck! Oh well, 700 bucks later and my music collection is getting better and is really the only way to go. I have not tried apple yet.
Also i really enjoy the fact that if you pinch your fingers on the audiograph you can zoom in or out. The only issue i have with this is you have to do It within a single audiograph, even though it zooms in on all the graphs. What i would prefer is that tou just pinch the audio part in general to make that happen. When i have 4 graphs, songs on the side and decks on top, it makes those graphs really small and difficult to pinch. Small complaint.
Engine os
I love the program, for the most part it is easy. Let me just say adding stems was a game changer, thank you programmers for that!!! The main and only real issue i have had is with with 6 of the 8 aiff files i have had, they do not seem to analyze properly. I ended up getting them in wav and it makes them perfectly every time. Only issue with wav is that there is no cover art. Now i could learn to properly make a beat grid for the tracks, that is something i ■■■■ at. I really bought this product for the plug and play in every aspect.
To wrap it up, i love the deck. 9.5/10 My complaints are small and for the most part are because of my short comings. If you have interest in my mixes for reference or just general curiosity look me up on youtube under DJ FF06B5. I really love loops and this system seems perfect for me so far, that being said i do not have any experiences with any other equipment really. Thank you for reading and i look forward to your insights!