However, the downside comes in usability and support. For example, the Glacier Protocol was designed to serve a similar niche to Casa. But in initial testing Glacier took 8 hours to setup and 4 hours to withdraw coins. Even if practice can reduce this time, it still will require time on the order of hours for each transaction. Glacier involves hundreds of dollars worth of equipment, a complicated process that involves modifying laptop hardware, using the command line interface, and installing operating systems, with no reliable support in case something goes wrong.