I can live without the display, but I've heard great things about it being very easy to read in any many conditions. The battery IS the one thing that scares me. I would like to wear it for everyday use while on vacation or boating over a long weekend without having to charge it all the time.
Hey Chris, thought I would chime in on this for you. Check the link below and you can see a side by side view of the OCi and Teric. I dive with both computers.
Teric Review
I think we kind of of had the same mentality on the daily use of the DC. I wanted to use it while coaching, teaching and diving. How long will the battery last, year well a few days at most if you baby it. Last weekend I was in Key Largo and hit 9 dives from 35 feet to 127 feet. Charged the unit on Friday then set it to off until Dives on Saturday. I then turned off the computer when ever I was not using it. By Sunday night I was down to 22%. That said, my OCi battery is 3 years old.
There are 2+1 things I do not like about the Teric, Battery, Alarm and Bright sun light. We talked about the Battery, the Alarm is a frequency that I can not hear and the +1 is Screen like a cell phone, under certain lighting I can not see it.
Now What I like, about the Teric EVERYTHING. Except fort the Cobalt 2 (which I sold for the Teric) The Teric is the easiest dive computer I have ever used. This is thing is fantastic. So many options for setting up the display. I usually display Air for 2 tanks, Dive time (Captains get made missing retrieval time)
Prior to the Teric I had a Zoop, Cobalt 2 (my favorite when working), Veo, Helo 2, and the OCi. Everyone of these Computers died and was sent in under warranty for repairs (Cobalt three times). Based off reviews, Shearwaters are the most reliably computers. Teric is my first and So far I agree. I still dive with the OCi but as a backup. Between when I can not see the Teric (usually lake dives training students) the OCi is visible. In some zero viz dives, I could not see the OCi, but the Teric was Perfect. I also listen to the OCi Alarms.
Another benefit with the Shearwater is they are committed to keeping the DC updated, rumors are a feature updated coming soon. OCi has not been updated in years. Basically it is the Aqualung DC now.
The Battery is the one major thing, but if I had to buy 1, I get the Teric again. I am all about reliability.
Teric Review
Side note, I used a 5 year old Nokia Phone qi charger to charge this thing, took longer, but worked.