Half Well and full well tips are not that popular any more, and were quite difficult to blend.
Even when I started out I always used CND Velocity tips that had a micro well, and I cut half of that out! The good points were a nice tapered tip, and I liked the fact it was flush at the back of the nail,because when fitting you butted it up to the natural nail.
Nowadays I use well less tips as they are so easy to use, just place where you want on the nail, and they are a doddle to blend. Only downside is as the nail grows there is a ridge in at the back of the nail, and some clients like to pick at it pulling the natural nail away from the tip.
What tips do you currently use?