Been using Suunto Vypers for a number of years and have no issues with it. I use a wrist mounted version, but my other half has hers on her console. Easy to use, reliable, can change the battery yourself and has Nitrox capability, PC connection etc. Not sure how it compares price wise to the Gekko, my guess is a little more expensive.

Only slight question is that it appears conservative when compared to other computers being used by some of my dive buddies. I assume the Gekko will have similar, if not identical, software and so would perform in a similar way.

Not a problem as such, in fact, some might prefer it. I have just had a couple of instances, on multiple dive days, when towards the end of the 3rd dive I am hanging around at 30ft watching some of the group still enjoying the reef at 45 or 50ft. Not a major issue, but thought I'd mention it to see if others had similar experiences.