Wow, that looks much better than the older SI-Tech system I have, which you just push into the cuffs. They tell you not to grease the O-ring but that's the only way I can get it to work reliably. I got them because they were cheap and they were the devil I knew.
Around here, the DC system has many fans. I don't think you could go wrong with them, but this new SI-Tech system looks neat.
A couple of tips:
The blue gloves that the LDS sells for $70 are about $7 bought from the right place, like a fisherman's supply shop. Google Atlas gloves.
The yellow knit liners are warm but as was said, too bulky. Get some snug Polartec gloves with a short cuff from an outdoors store. Mine are actually from a runner's store and they are PERFECT for diving.