Quite good puzzle game, which you can finish in about 1 or 2 hours. Not as long and not as good puzzles as for example the Room 1/2/3, but still fun. The story is also quite simple, but the story is not what this game is about :)

Some puzzles are "well hidden" (you have to notice small notches that can open a box when manipulated ... otherwise you get stuck until you do), some are a bit weird (the rotator puzzle - when I started manipulating it to examine how it works, suddenly I randomly solved it ... without realizing why :)

Quite a nice simulation - you can enjoy hours and hours of nice driving in European landscape.

The deliveries and the economic model - simplified from reality enough to be comprehensible and quite fun, although in late stage (if you purchase some garages and hire drivers) you'll earn more money than you can spend, even if you drive your truck like a lunatic and have to repair it frequently because of all the crashes.

Pros:

Nice landscape and scenery, the real distances are "scaled" down 25:1, so 100 km of road in real world is compressed into 4 km of road in game, while preserving the scenery and the look that can be seen in the road in real life.

Moddability: game support mods and the modding community is quite active, so you can download more trucks (there are more european trucks, but also russion or american trucks), more roads (russia. alternative roads in Alps region, even Nurbugring if you want :)), etc ...

Cons:

The traffic is quite stupid. Blindly obeys any speed limits (50 speed limit = everybody will drive exactly 50, unlike real world where 50 = most people will drive between 40 and 60, few of them faster) and is generally incapable of handling human driver errors. If you park you truck so that 30 cm of your truck stands out into lane - traffic won't drive around you, just stay there and honk. If you fail to give way to traffic on main road, they notice you too late and ram you instead of trying to brake or drive around you. Same when overtaking, if you fail to judge the distance needed for overtaking correctly - they won't try to move even a bit closer to the side of the road to avoid a collision. Well, maybe this is how the real world would look like once most of the cars will be computer-driven :)

Also, when you drive from minor road to a main road, in real life you look to the left and right to see if there is some traffic before you. In the game it is difficult, as you cannot map some keys (or hat switch directions?) on your wheel to quickly look 90 degrees to the left/right, so you have to take one hand from the wheel and use mouse to look around.

Physical model: if you drive too fast into a bend, the truck will never drift, but always will start toppling over. Even without a trailer and on wet road. While this is not exactly a racing game, perhaps the physical model may be more realistic in this regard - the game now does not feature icy roads and snow, but if it would, you should drift into a ditch instead of toppling over if you go too fast through a bend.

The game is actively developed, so perhaps one day there will be a patch addressing these minor issues, making the game much more fun. Even with these issues, I recommend the game if you like driving a truck :)