At Expressjet you fly all the time on reserve on the 145. On the 175 not as much but that is about to change when these last 9 airplanes go online by April 1. Ready reserve max 6 times per month for only 4 hrs. Can’t get it two days in a row or on your last day. So it’s mostly 2 hr short call. Very short reserve as well. Couple months max.

Also you have a chance to get the CJO with United on the front end. You can prep for your interview and get that done while on reserve. Worked for me. From CFI to right seat at United in 2.5 years won’t be half bad!