I've been using the omnipod since february and quite of lot of them (maybe one in six?) fail, with no warning. And more than 50% stop precise pumping round about 50-60 hours in, so the last 12 hours is very rocky. I get no warning apart from my freestyle libre letting me know I'm going high. Given the number of beeps the pump makes (I've turned off all the optional ones) when its getting close to change over, I'm surprised it doesn't warm me when its canula is not delivering all the insulin properly. I'm never really sure how bad it is until I take the pump off, and find the backing wet and smelling of insulin. To be fair insulet have always replaced the faulty pumps, when I've asked (at first I thought it must be my fault and didn't report them) but its a terrible waste of insulin. Obvs the NHS pay for that, but its still expensive to somebody!
It's good to have the bolus calculator helping, and the ability to have very small doses is great for correction. It IS nice to add a dose of insulin without injecting, often involving partial undressing. However I don't think the technology is really reliable enough yet, if I can't even nip out for half a day without carrying a pen aswell.
I also found all the locations quite uncomfortable at first, although now we're more in summer clothes - lighter weight - that seems OK. If its as bad next winter I think pens might be a better bet.