When I first got into dab rigs, I quickly realized that not all oil bongs are created equal. The best ones often have features like compact design with solid joint connections and optimized airflow systems. These details help create a smoother, cooler, and cleaner vapor that really enhances the flavor of concentrates like wax or shatter. Materials also play a big role; borosilicate glass is a common choice because it can handle heat without becoming brittle, which means durability over time. Also, a well-engineered rig allows for easy cleaning, which is essential to keep the taste pure. So if you want a top-notch experience, focus on things like sturdy build quality and effective percolation that maximizes vapor cooling. That was my takeaway from experience once I got into dab rigs—the right equipment really transforms the session.