I've been injecting insulin with the Flex Pens for 9 years and I just inject right through shirt sort of just under the table at a restaurant. No need to go to bathroom. If you use vials then harder to do in public though I've seen that too. The Flex Pens are super convenient but more expensive too. But inject right through your shirt/blouse. Easy. The time change will take about 2 days to adjust to. No prob. I do European travel a lot. No big.