I started with an SD Codefree and have tried both the Accuchek nano and mobile, all self funded. Like Robbity I'd recommend the fastclik over the lancer that comes with the Codefree, particularly if you plan to change lancets frequently (some people do, some people don't).
I've been using the Accuchek mobile recently, more expensive but I like that it's all self contained, so no used strips floating around the bottom of my page. Not needing a special cable to plug it into a PC is great, just a micro-USB cable and instant access to reports and test info in CSV format. Had no problems with the SD codefree, just find the Accuchek mobile more convenient.