Hi
Cyklon was referring to a wrist mounted computer when he said simple is better.
An analogy to this situation might be the wristwatch against a pocket watch.
It is plain to see that most people (not all) prefer to wear a wristwatch for convenience and ease of use.
It is similar in diving except you don't put your console computer in a pocket but leave it to dangle in the sand, kelp, pondweed etc. as you're swimming about. If it hasn't been secured properly then you may not know where it is, and then you are distracted as you reclip it or whatever. Surely it is easier just to glance at your wrist particularly as you are in a horizontal position (well you should be) You will probably refer to your computer more times than your contents guage once you've done a few dives as you will get to know your consumption rate and so you don't need it in the same console.
You finish the dive and the computer is then dragged around the boat, RIB, car park etc. and if you're checking your surface interval, possible dive plans, filling log books then you are required to be right next to your kit, more inconvenience.
Really, you should have two dive timers in case one fails and one idea is to wear one on the right and one on the left. The uwatec bottom timer is good value for this and I wear one on the left wrist next to my compass, which is bungeed to allow removal if the bearing is critical.
Its all about convenience and ease of use. I prefer a wristwatch to a pocketwatch.
Kindest Regards
WL