Pros: Amazing quality, ease of use, UI responsiveness, great media support on DLNA and USB
Cons: Front panel display doesn't show CD track number
Since this our first Blu-ray player, I don't have extensive knowledge or experience by any means, but I knew what I was getting, and I was not disappointed at all. The S590 has many connection options besides the standard HDMI, including a composite RCA video connection for older systems. Additional audio options include both coaxial and optical digital audio, as well as standard RCA analog out. 100 Mbps Ethernet LAN is of course included for Internet connectivity, although this player has built-in WiFi (no expensive adapters needed!) for your convenience. The S590 has two USB ports: one on the front panel for playing media from flash drives etc., and one on the back for BD-Live storage.
I like the sleek glossy look of this player, although it does show dust and smudges fairly easily. The front panel display has several brightness levels, but even at the brightest setting it can be hard to read from the other side of a well-lit room. Also, the front panel display does not show CD track numbers, but only the time counter. This is slightly disappointing, as we play many CDs on this Blu-ray player, but it isn't a huge problem at all. The Now Playing interface for CDs, USB and network media is very aesthetically appealing, and the Gracenote integration works well.
Other than CDs, we mostly play DVDs in this player, although I've played a couple of Blu-rays as well. The quality is excellent, and I find no problem with it. I can't really comment on the DVD upscaling quality, as I have nothing to compare it with. Load times do not seem to be excessive, although, seriously, why are we so impatient to watch a good film? So what if your player takes 20 seconds longer than some other player? It's worth the wait!
Startup time, however, does take some time, which is slightly frustrating for playing CDs. This can easily be rectified by changing a setting which causes the player to start very quickly, but at the cost of higher stand-by power consumption.
The only Internet apps I have used are Amazon Instant Video and YouTube, and both apps work great with no complaints.
I actually quite like the UI. It is very responsive, and fun to use.
All in all, I highly recommend the Sony BDP-S590 to anyone! It's an amazing player with great features and a great price!