I was given a Gluco RX Nexus when I was first diagnosed 6 months ago and found it pretty accurate and in line with my HbA1c. Then, when my results got better, darned if they didn't take my strips off prescription. :-(
So, based on recommendations on the forum, I bought the SD Code Free - strips are only £4.99 for 50 (as against £11.95 + pp) for the Gluco Rx. The SD does return slightly higher results (around + 1 mmol/L for me) and that's a bit disconcerting at first but overall, it seems a reasonable fluctuation for much cheaper strips. I compared both the first day I used the SD Code Free, with the following results (mmol/L):
Test Type: Time | Gluco | SD | Difference
Before Breakfast: 08:55 | 6.1 | 6.3 | + 0.2
After Breakfast: 11:05 | 4.6 | 5.0 | + 0.4
Before Lunch: 14:10 | 5.3 | 6.5 | + 1.2
After Lunch: 16:10 | 6.4 | 7.5 | + 1.1
Before Dinner: 19:50 | 3.7 | 4.6 | + 0.9
After Dinner: 21:30 | 7.2 | 7.3 | + 0.1
Before Bed: 23:10 | 8.2 | 8.1 | - 0.1
Have used the SD Code Free since Christmas and it consistently returns a slightly higher reading of around 1 mmol/L although it seems less accurate at higher levels and more accurate at lower levels. I've decided to run with it until my next HbA1c and see how things go.
I'm still using the Gluco Rx to test once a month (over 3 days). The Gluco Rx has a USB connector and you can get free software to download results. It also gives an indicator to test for ketones for high BG readings. In the end, I suspect I will stick with my Gluco Rx rather than the SD Code Free, even if the strips are a bit more expensive - just because it feels more accurate.
PS: My BG levels were lower than usual this day as I was travelling by car for over 8 hours and not eating much until late evening.