My hubby bought the Sol...I got the Terra...we both love these gauges..we have been using them for about 6months with no problems...you have to get the setting adjusted for you..but they are right on and hold a lot of info...a true computer...they have not failed us....but it is good to remember that one should never leave their safety to any mechanical device...these devices are only tools in diving and should not replace our own training and common sense..