I have the upgrade of the Mares Apnea , the Nemo and it is unbelievable.
All the same functions as the Apnea, it just has all the scuba functions added onto it.
Fully downloadable and you can set it to free-dive mode or scuba, so brilliant for both diving sports.
Be careful when buying from Scuba store or any online stores, the import charges on watches will be 40% plus 14%VAT plus shipping, and if it brakes you have to send it back to the country you bought it in.
I can get the Nemo Excel for about R5000 and the Tusa Element for R2999 in SA from the Agents.
I am not sure if they have the Apnea in Sa but can find out if you are interested.
Cheers