The security checkpoint setup in the main terminal is terrible. Congested too few lanes waits that require you to stand on steps. I flew through CLE two years ago and I thought then I hit the occasional bad day. Flew through yesterday was worse though not really that busy. What was really disappointing is that nothing has been done in two years to improve the situation. It's way past the time knowing these security stations are going to be a permanent requirement so Airport mgt needs to step up and get some over due renovations done. In addition the restrooms in concourse A are undersized narrow halls to get into then way too small with too few facilities. The rest rooms and security the Airport can do something about. The last comment has to do with the location of the car rental facility. Common sense would have had the facility as close to the airport as possible for customer convenience along the main road but no site selection put the at the end of a dead end street the bus passing empty acreage which would have been much more convenient.