Not that expensive, slick UI, full of features, great Android integration and a wonderful dial/crown which is well used in a couple of apps to make it all easier - you can use it to answer/cancel calls or finish/repeat alarms/timers.
AND THEN Samsung launches Watch 5 and DROPS THE FREAKING CROWN! Back to 1.5 buttons - because the second one, as the Apple Watch, is stuck to Samsung Pay (can't even set it to Google Pay) and recent apps, no app uses.
WHY? WHYYYY? The crown is amazing for scrolling through screens when I'm biking (shaky) or swimming (touch disabled). It's WAY better for scrolling in that tiny screen. It's awesome as interaction aid. WHY REMOVE IT??
I do miss the long battery and buttons, but I must mention that a touch screen gives you many more UI possibilities.