Summary
The general opinion of the 60 reviews on the MTBR.com review site is that the Specialized Hardrock Comp Disc is an excellent value for people who are new to the Mountain Biking sport. With a frame of inredible quality it's best to buy the bike, and upgrade the components as necessary as your skills improve and you start focusing on different kinds of riding.
Positives
A rock solid, versatile, and well constructed frame is the greatest strength of the bike, with many people opting to keep the frame and upgrade the parts instead of purchasing more expensive bikes in the $1500 range. A lot of people really love the disc brakes, as well as the included shocks and tires. What many of the users really enjoyed was how adaptable the bike was for their various needs. Many of them purchased this bike as an entry into the sport so they're biking in all kinds of conditions, from easy trails to uphill climbs and rugged downhill slopes, to commuting to work. For all of these conditions the bike performs well.
Negatives
The biggest complaint about the bike revolves around the poor pedals and grips that come standard. Many people had the pedals break on them in a short amount of time, and most people found the grips to be almost worthless without gloves on. Another complaint a few people had revolved around the front suspension fork. Specialized advertises the bike as an all-use item, but the front shocks are not meant for bigger drop offs and jumps, with a few users reporting the fork getting bent. Most complaints revolve around the quality of the components, but that's just compared to more expensive offerings, compared to other bikes in the same price range the Specialized is above average in that department.