Spiralized Vegetable: A Low Carb Alternative to Pasta

I've been seeing recipes all over the net using spiralized courgettes as a low carb alternative to spaghetti. Along with the recipes I've seen websites selling gadgets that spiralize the courgette for you. 

It all looked a bit messy to me so I was happy to see ready prepared spiraled vegetables for sale in Dunnes Stories this evening. I'm sure this makes dinner prep far easier so I might try them some day.

There was a selection of spiralized vegetables including beetroot, courgette and sweet potato.  

Have you eaten vegetables like this? How were they - does the courgette make a good substitute for noodle?