Betachek Visual testing strips are dirt cheap: with a good pair of scissors, each test will work out at around tuppence. (That's two new pence, or 2p.) And they're on the Drug Tarrif: they're available on the NHS.
Okay, you don't get a result with a decimal point in it. But you do get great accuracy for anything under 7mmol/l. (That's where my blood-sugar normally lies; for the testing is so cheap, and quick, and simple, I can happily test my blood-sugar 15-20 times per day - I've sometimes even tested my blood-sugar, using these strips, as I literally walk along the street.) And for any result I get above around 8 or 9mmol/l, then I'll use a meter-read stick to get the desired accuracy.
Unless your skin is not clean, or you fail to take due care not to contaminate the strips, the result is 100% reliable. (Nb. If you fail to take due care, then you're very likely to notice that - unlike in the case of meter-read sticks; for the pad that yields the result will be visibly smudgy.) And for anything under 7mmol/l, you get the result in under a minute.
Moreover, they're so simple, so elementary to use - not having to fart around with a clunky electronic meter (which may in any case suddenly disclose that the battery's exhausted, just when you least need that to happen) - that the difference in time taken to yield a result, alongside the meter-read sticks, is practically negligible.
I use meter-read sticks too, of course, especially first thing in the morning, last thing at night, etc.
But if there's any difference between the results I get from the meter-read stick and the visually read strip, then I know which one I will rely on.