Nothing beats a climber IMOP. I love the portability factor. I have a couple chain on stands and have'nt used them since I bought a climber. Mine is an API bowhunter series. It is very open, you climb facing the tree and use upper body to climb. It took a little getting used to.

You seem to be on edge from your hair raising experience. Perhaps you would feel more secure with a bar accross the front, stand up sit down model? I've had a few slip ups but it was my own fault due to not wearing a safty belt. I almost fell over backwards! They come with a belt or harness for that very reason!

Ladder stands are not my idea of fun. Chain ons do have there place though. Esp for that perfect spot where the trees are too big or crooked to climb.

Summit seems to be king right now, although pricey, you'll have peace of mind when thirty feet up the tree.