As a full-deco computer I like it a lot. The theoretical tissue loading graph which can be displayed underwater is a BIG help if you're diving your own profiles yet using the computer as a guide for deco. It allows you to add however much conservatism you want to over the base "0" level and yet know what you're doing relative to baseline. There's no other computer currently on the market that makes this possible. I dive mine set to zero conservatism which gives me a "baseline" and then extend my stop profile to get the tissue graph where I'm comfortable, and have developed a good feel for what it needs to look like before I get out. Works for me and leaves me feeling great post-dive - what's not to like about that?