yeah i'm always leary of the one stop app that does everything. i rather have an app concentrate on certain things rather then everything. it gives more room for error. but i must say many use rom tool box with no issues. i bought it a long time ago and i have never really used it.
also on a side note, you have a class 10 card. is there any need for more speed? i partitioned my 16g patriot class 10 card and i never did anything as far as read wrire speeds go. as long as my apps ran smooth with no lag i was fine with that.