I take Lantus and Novorapid every day. On the pump you only take a short acting insulin, like mentioned above it's a drip system so your body is consistently getting a small amount of short acting.
There are many pros and cons to the pump. There are also at least a few of us on here who have tried the pump but decided it's not for us.
First you really need to ask why you want the pump and what you want to get out of switching.
Personally, I lasted three months before I sent mine back. I had a hell of a time. I couldn't get my basal's right (it can take months to get it correct for some people) so I was always spiking and then dropping and then spiking and then dropping. My A1C improved a whole percentage, but my control was much worse than when I was on Lantus and Novorapid.
I also had a hard time adapting after 16years to being attached to a machine 24/7 rather than just having to carry a few needles and vials. (People say you carry less when you're on the pump, but I always had to carry at least two infusion sites, a vial of Novorapid, a few needles just in case, the swipes to clean the site..my bag got a LOT bigger with that, than it is carrying a bag of needles and two vials!).
I had a number of site failures and I had a really bad problem with ripping my site out while sleeping. I also has my site ripped out a few times when the tubing caught onto things. I also had problems with clothing. It would take 3hours of destroying my closest and ending up sobbing to find something comfortable to wear out to the bar or even to my Staff X-Mas party. I had all the accessories to allow me to wear skirts and dresses with the pump, but they were so uncomfortable I couldn't use them. I always ended up in a pair of jeans and a long tank top so I could hook the pump to my belt while my girlfriends were able to get all dressed up to go dancing. I don't always dress up, but not even having the choice too was a real blow to my self-esteem.
I met my boyfriend and started dating a few weeks after I started the pump..he thought I was crazy (really it was just dealing with the multiple lows a day - i went from one or two a month to 3x a week min but usually more like 3 a day - and then spiking right after) and he always thought I had a problem with feeling bad in my clothing (which is partially true but it was much worse on the pump). We've been together over a year now and he def saw a bit difference in my attitude once I went back to shots. Same with my mom, who started off being my biggest supporter of getting the pump (after years of suggesting it) who quickly changed her mind once she saw how much of a struggle I was having trying to get my basal's right and stop feeling so crappy all the time.
When I went to my endo's to discuss keeping or getting rid of the pump as the 3month money-back guarantee was almost up...I had a low that morning in the office, then again in the MIDDLE of our meeting. We decided the lows and the spikes were not worth it. Neither of us are happy with the current technology (he'd like to see the pump do all the work and act like a pancreas with less user interaction) but we will come back to the discussion of possibly trying again when I have a family or the technology improves.
In the end though, it was a good experience because I did learn that what I am doing now is what works best for me.
That doesn't mean you'll have the same experience, some people love the pump and their lives had improved greatly..but just like pens and syringes, it's just another tool we have available to us so if it doesn't work, you still have options.
If it doesn't work for you and in the end isn't what you thought it would be, there's nothing wrong with that. If you get it and it changes your life for the better, that's great too.
I recommend trying the saline trial of a few pumps you are looking into. Looking back on it, the saline trial didn't really help me learn what life would be like on the pump (because you can take it off whenever you want), it was helpful to learn the pump itself before my official training and learn how to put in sites, etc. It'll also help you learn what different features you are looking for in a pump, so you can decide which will work best for you.
Best of luck with your decision. Remember, no one can make this decision for you.