I worked with them for over 6 months developing an app as part of my Masters coursework, which was really good experience overall! The entire process from beginning to end took around 3-4 weeks instead of many more than that due mainly because we were working in partnership together throughout this time (the client is also studying at our University). It would have been great if they did some work after hours but it seems like all their resources are focused towards daytime use only :( so maybe try asking questions about things you don't understand or feel uncomfortable using? Some simple issues could be resolved by having someone talk through how something works/what's happening during debugging sessions etc., e.g. "I'm trying out one thing here" becomes useful when explaining what happened next step up :) Great people though who get stuck into problem solving quickly & come prepared before hand too (which isn’t always easy depending where your project needs!).