I still have to put up with comments from people "why bother", "you might as well drive" etc, but it doesn't bother me.
I converted my MTB with a BBS02 kit and don't regret it a second.
I wish I had a £1 for the amount of people who said 'That's cheating' over the last 5 years but I would have said the same thing at one time.
It's weird how commuting to work in a car, taxi, bus, on a motor bike, moped etc are all OK but it's cheating if you're on a motorised cycle
My brother in law has got a £5,500 Cervelo (!) which he obviously adores and calls me a cheat.
I asked him to come down one Sunday morning to try an experiment and I told him to ride to the bottom of the bank where I live, ride up on his bike and remember how easy/difficult it was to do.
I put him on my hybrid, told him how to use the assist and when he gets to the assist that feels like his bike to tell me - the hybrid was on number 4.
I then got the MTB and told him to do the same, he got to the top of the hill on assist 5 and was out of breath because he couldn't get to the same feel as his bike.
My conclusion - his £5,500 bike is cheating