Weigh up the pro's and con's, if your happy on MDI and don't have any issues then stay on injections, if your experiencing issues on injections which a pump may resolve then the obvious choice is to move over to one.
The pump classed will give you more insight into the workings of a pump and whether you would adapt to using one.
But as with everything, there are pros and cons - read everything you can - 'Pumping Insulin', 'Think Like a Pancreas', everything here on the pump forum.
I LOVE MY PUMP. For me, having the control I'm achieving massively outweighs the mildly faffy bits.