No board is perfect, when you mass market something there are bound to be peopel unsatisfied with it. What matters is whether or not you're comfortable with the amount/seriousness of the negative replies in comparison with the positives. I personally have had zero problems with my Gigabyte board, so you can take that as a glowing positive review.
As for heatpipes, generally heatpipes are better than standard heatsinks, as the CPU heatsink industry has shown by shifting from the small compact heatsinks to the larger heatpipe towers. I chose the DS3P because it filled the features I needed and as a bonus, came with a heat pipe to cool the northbridge. The DS4 seems essentially the same, but extends the heatpipe to the southbridge as well, I couldn't justify paying extra for it though, $150 was pretty much hitting my tolerable limit on a motherboard.
Edit:
The placement of the connections on the board are also a factor depending on the equipment you put in. I saw many other boards had bad placement of some key items like SATA connectors and such, you may want to look those over. Specifically, some boards have their connectors blocked if you use a very long video card, or the memory slots are in the way of some heatsinks, or even that there may not be enough clearance around the CPU area to mount certain heatsinks.
From my build, I have an 8800GT and that fit fine (inside the P182) with nice clearance to the other parts of the board. However, if you are adding an Arctic Cooling Accelero S1 to the video card, the cable of the upper SATA port will touch the heatsink. There's still room for it, but that might be something you'd want to know. The 4/8pin 12v connector is also a tight fit next to my Scythe Ninja, but it is very much out of the way of the heatsink, unlike some other boards.