I can't help with the pumps as im on a tslim pump but cannulas are all v similar. I was on a pump when I had my daughter ( 17 yrs ago ) and can say with confidence she/me never ripped a cannula out. I have ripped a couple out in 18+ yrs of pumping and it hurts no more than ripping a plaster off! I have used both teflon and steel. Steel is much easier to insert as it's just like injections, you just stab it in, the teflon ones take a minute or so, I have in the last week switched back to teflon and I do watch a YouTube video when ive changed them but before long I will be doing it without thinking again.
I like how simple steel ones are to use but I find they can be uncomfortable for me to sleep on if they are anywhere apart from my lower stomach and I want to rest my stomach for a bit so im going back to teflon so I can use other sites for a bit. That is what you need to remember, you might have a pump for 4 years but you can change cannula choice during that time. Good luck.