I like mine, but it's not without its quirks.
By necessity, the user interface is kind of wonky - Entering numbers is accomplished by pressing a combination of buttons and knobs scattered all over the front panel.
As with all their other radios, Elecraft has taken the nanny-state approach to transmit frequency coverage - i.e., it only transmits where one of their software engineers decided it would transmit.
Would really like to see some sort of illumination for the front panel - and another 10 watts or so of RF output (even if it meant going to Li-Ion or LiPo for the internal battery pack). That would also put it within spitting distance of driving the KPA-500 linear to full output - barefoot. Currently, it's working hard to push 250 watts out of the linear.
The audio output through the built-in speaker is wimpy and buzz-prone. With headphones, it's superb.
The combination of SDR and a very responsive tech community is wonderful - In the short time I've owned the radio, I've already seen some major feature and minor performance upgrades.