Merits:
The principal Merit of Cyberlink PowerDVD is the high quality Video and Audio experience, in my opinion. Cyberlink PowerDVD 7 supports the highest definition video palyback via the supporting for key next-generation formats such as MPEG-4 H.264. PowerDVD 7 supports DTS and Dolby surround sound technology, that’s the reason its true home theater sound surround. The simple convenient interface and menu help its generalization. It has 5 UI modes and multiple skins, you can exchange it in your mind. PowerDVD 7 has some smart utilities, so as to increase the convenience. PowerDVD supports the UpnP network, you can play videos from any UPnP enabled device in your home network. The cost performance of Cyberlink PowerDVD is very absorbing. The help file is very detailed.
Demerits:
Cyberlink PowerDVD 7 is a bit fat. It doesn’t support the Windows 98 and video desktop.
Benefits
Cyberlink PowerDVD 7 has uncluttered buttons and icons, and every item includes a footnote explanation. You can adjust the control screen in your opinion. 
Cyberlink PowerDVD 7 dynamically adjusts the brightness/ contrast/saturation ratios in scenes that are overly dark or too bright. Cyberlink PowerDVD 7 produces minimal distortion in the center of the picture.
Cyberlink PowerDVD 7 give you true home theater experience by DTS & Dolby Digital. CyberLink PowerDVD converts the stereo audio sound and outputs it to multiple channels. 
Cyberlink PowerDVD 7 give persons more smart utilities. See-It-All ensures that a movie can be watched in full by calculating a notebook's battery power versus the remaining movie length and adjusting the movie playback speed accordingly. PowerDVD's intelligent technology ensures the more you play, the more accurate the estimate becomes. Remaining Notebook battery power is indicated via a convenient icon on the screen. PowerDVD's power-saving mobility controls can extend movie viewing by up to 30%. Read-It-Clearly lets you enjoy unobstructed viewing while watching 1 or 2 sets of language subtitles. Using a standard-sized monitor, you can select to watch the subtitles of 16:9 DVD within the black bars on the bottom of your monitor. Whether you missed that crucial Hollywood moment, your favourite actor wasn't speaking clearly, or you are simply practicing your listening skills in a foreign language, Say-It-Again automatically repeats what was last said—with a simple click of a button.
Cyberlink PowerDVD has five UI modes and multiple skins, you can choose your favorite.
Setup:
The size of Cyberlink PowerDVD 7 is 79.1MB. There is no adware, spyware or virus combined with this utility. The installation is very easy, so as to uninstallation. You just do follow the wizard, but don’t just click “next”, you’d better continue the process after you learn the content clearly. This program offers a quick door to remove the entire program.
Interface:
Cyberlink PowerDVD 7 has 5 UI mode and multiple skins, you can switch any of them for your needs. The program has an uncluttered screen that makes selecting and navigating simple. You can toggle the size of the control screen with the touch of a button, shrinking the control panel so it doesn't get in your way.
System Requirements:
Cyberlink PowerDVD 7 can work well-balanced on Windows Vista, MCE, XP, 2000, ME. The minimun CPU requirements is Intel Pentium III 866 MHz or AMD Athlon 1.0 GHz. The Memory requires 256 MB RAM or above. Hard disk requirement of at least 90 MB. Minimal desktop resolution at 1024 x 768 or 1280 x 1024 recommended.
Conclusion:
Cyberlink PowerDVD 7 is indeed a good choice of home DVD playing. If you want to experience the the theater sound surround and clear widescreen DVD palyback, Cyberlink PowerDVD is a advisability choice. If you like watch your favorite DVD Movie in your Notebook, it will give you more convenience, it can extend movie viewing by up to 30%. The attractive cost performance is one of the reasons that it is so famouse.