Hi Carol,
I had 4 years on Novomix 30, when they thought I was Type 2. When I was correctly diagnosed as Type 1 last September I was changed to basal/bolus......Lantus and Novorapid. I now inject 5 times a day and have to admit, it offers more flexibility. The trouble with a mixed insulin like Novomix 30, if low-carbing, is that you'll need less of the fast-acting insulin but you can't adjust one without the other, if it's pre-mixed. Sorry, that probably sounds confusing. I'll try again. If you are on basal/bolus, you can set your long-acting at one level and adjust your fast-acting to suit what you are eating....with Novomix, that is not really possible, as it is pre-mixed for you.
If you don't mind the extra jabs, basal/bolus will probably be more flexible for you but be prepared....it takes a lot of fine adjusting when you first change over. I'm still trying to get my dosaging correct but for all the faffing about, I do think, long-term, basal/bolus, is preferable for most folks on insulin, if wanting to to try different dietary ways.
All the best, chocoholic.