This novel has a great premise, which is in many ways it greatest strength. Weir is great at delivering technical information in his writing style, and a great part of the text is quite technical. But it's succinct, and is never bogged down with advanced vocabulary. However, if you are not looking for a story that talks a lot about the technicalities and issues of space travel and inter-planetary exploration, this book is not for you.
The story itself is good, switching between the main characters life on mars, and the events of those back on earth adds a refreshing change of pace at key points which keeps the reader engaged. Do not expect a deeply philosophical approach to difficulties faced by a lone human on a barren world, you wont be getting it. Life alone on Mars is described by Mark Watney, a likable and quick witted botanist, who likes to keep things simple, and humorous.
All in all, this book will interest the sci-fi fan, and will appeal to the casual reader, such as myself, looking for a new and refreshing story.