Complex sentence: Jeffrey Wilson found that YouSendIt was easy-to-use and noted its digital signing and cloud storage features, he did have problems when trying to use the digital signing feature with the phone held vertically and experienced occasional crashes.
Split into simpler sentences: Jeffrey Wilson found that YouSendIt was easy-to-use and noted its digital signing and cloud storage features. Wilson did have problems when trying to use the digital signing feature with the phone held vertically and experienced occasional crashes.