There has been a heated debate about cloning research for years. Some say that there are many beneficial effects on human beings. However, it shouldn't be promoted for the following reasons.
The most important reason is related with ethics. This technology could be utilized in medical field. Instead of waiting for donor, people can utilize their own clone. Human cloning would be made only to donate their body for original one.
Another reason is associated with risks. To utilize clone technology in commercial use needs lot of dangerous excitements.
In addition, cloning research needs financial costs. Even though they have succeed in using this technology for practical use, it would be expensive. Poor people can not use it. Therefore availability is limited.
All above reasons, I strongly believe that cloning research should be discontinued. There might be beneficial for human beings. However, the technology and money should be used other field: stem cell, climate change, and serious diseases.