I wanted to necro this thread that was the original discussion for the BLW to say that this thing is legit. Don't waste your money with stupid aftermarket 72 pin connectors that have a death grip on your carts and will wear down your cartridge contacts. The BLW removes a step in the process. there's no pushing downward on the cart either which just makes the process a lot more streamlined.

these days I imagine most people are playing a flash cart and seldom remove it but for boomers like me who still play on legitimate cartridges, this thing is a life saver!!