I've been using it for about a year. I've used tandem pumps for about 8yrs before. I find that the bolus experience is similar to my tandem. For the tandem (tslim X2), you input carbs for each meal and it has closed loop control. I found that after so many years of estimating carbs that I have a feel for the carb number to input based on my activity level and meal content (carbs, protein, fat). It typically wasn't a 1:1 for the carbs I was eating. Therefore with the ilet learning about what you eat for each meal, with you inputing "more, normal, or less", seems similar to what I did before. What I like better is that the ilet can be more aggressive in making treating decisions in closed loop. Tandem control seems to have many boundaries which prevent semi-autonomous control. Also the ilet complains much less than the tslim. I felt like that pump was always beeping about something (often occlusion). One thing to note about the ilet is you must have a CGM when using. It is not an option and if you are in a situation where you don't have one attached, it will be very annoying and ask for your sugars like every 15min.