SysInfo Tools PST Merge
Full user review
"Works Fairly Good!"
Has a user friendly graphic interface which is easy to use and also worked smoothly on multiple PST's.
The features are limited to merge PST files. Software like PST merge tool provide more options with easy interface so, that can be preferred.
Any one can use this program if they only need to merge PST files bu for multiple features i recommend to visit here (www.pstmerge.net)