Hi,
I would say a pump makes things a lot easier for someone who doesn't have a regular routine. It all depends on what you want to expect from it. For instance if I need to go from work to uni I have to cycle (its about 7 miles up hill) I don't usually have to take on board any extra carbs, I can just turn my basal rate down about 30mins before I go, whereas if I was on injections to do exercise without taking on extra carbs I would have to lower my basal the night before. I find that my control is not just much better but also tighter with less highs and lows than when on injections.
Pumps are really hard to get for a lot of people the nice criteria are listed on lots of different threads have a read. I think I'd be right in saying though that you would only qualify for one if you were having lots of problems with hypos. To get your basal settings right and bolus and carb ratios right is very intensive to start off with. For me the intensive bit took about 6-8 weeks then another couple of months to get properly sorted, I think that's quite quick compared with some other people. For the intensive bit it entails doing a lot of fasting basal tests and experimenting with bolus and bolus timing and then experimenting with temporary basal rates. So that would be doing anywhere from 10 to 20 tests a day and recording all the carbs fat and protein your eating, what your doing with your pump and what your bg is then trying to analyse it all and then adjust until you get it spot on. In saying all that you will have to keep changing all the aspects as your body changes eg weight, age, stress, (if you're a lady hormones). Although this isn't exclusive to the pump if you are carb counting and on basal bolus you would have to do that with injections as well.
I would definitely never give my pump back I couldn't cope on injections and I definitely couldn't have the type of lifestyle that I have and want to have if I was on injections. If you are doing okay on injections though how would having a pump make things better that's what you need to think of.