After getting dropped in the saltwater, then in the sand, then back in the saltwater again and so on, and clients forcing the bail to auto flip (as opposed to manually flipping the bail) and grinding the gears etc they still typically last me at least 2-3 years for each reel

Benefits: Water Bottle Pocket, Premium Details & Fabrics, Top-Loading Design Roomy main compartment with space for all your stuff Side bottle pocket blends perfectly with your bag Cinch closure top load Secondary side zippered access to main compartment Padded and adjustable shoulder straps Fully padded back panel for long wear comfort Side compressions straps Top zippered stash pocket for quick access 100% Recycled Nylon 420D Capacity: 610cu in/10L Dimensions: 11x7.8x4.7"/28x20x12cm Weight: 12oz/0.34kg Features Benefits: Water Bottle Pocket, Premium Details & Fabrics, Top-Loading Design Roomy main compartment with space for all your stuff Side bottle pocket blends perfectly with your bag Cinch closure top load Secondary side zippered access to main compartment Padded and adjustable shoulder straps Fully padded back panel for long wear comfort Side compressions straps Top zippered stash pocket for quick access Materials 100% Recycled Nylon 420D Specifications Capacity: 610cu in/10L Dimensions: 11x7.8x4.7"/28x20x12cm Weight: 12oz/0.34kg

One of the systems being used in the Xinxiang Synthetic Leather Corporation in Wenzhou has been shown to save about ten tons of coal, and thus expected to save well over 2.1 million Yuan annually (Yu, Zhou and Jiang 2012)
The 4500, 5500 and 6500 sizes around that mid range are perfect for heavier lure setups for species like striped bass, tarpon, dorado, snapper, rockfish, or anything where you'll need a decent amount of 20-50lb main line
I also like to look at the point where the line contacts the rotor and bail arm, often called a line roller