There are various brands who manufactures pen drives but I would suggest to go for the Transcend pen drives.The pen drive is not only fashionable due to its sleek and cool design but also provides insulation from shocks due to its high quality insulating material.I have a transcend 4 gb pen drive.
Further to its positives it transfers the data at highest speeds compared to others.It is compatible to all computers too.The warranty is also provided by the company but I am using it for 5years and still working great.
The only negativity I have found is that it is a bit expensive than others & also has not transformed itself into high fashionable pen drives as displayed by others such as HP, Kingston, etc