I would not buy the items you mention except on credit card, nor anything like a laptop or TV etc.
However realise for protection under the consumer credit act there must be ONE item of >=A3100.00 value. If you buy 100 items of =A31 value or 5 items of =A320 value you are not protected. I knew this anyway, but some suppliers DO deliberately use it - a ladder supplier referenced on here will not refund =A313.50 and know a) C/C protection will not work b) Small Claims is too expensive for the sum involved. So beware.
#1 - There is nothing to stop you opening a C/C and then closing it.
#2 - It provides circa 42 days interest free. That is very useful for earning interest in the meantime, or resource- levelling cashflow, or allowing for returns - ie, you return something costing =A3500 but do not have to wait for cash to come back which can be 28-days etc.
#3 - It provides protection as above.
#4 - It allows opportunity purchases for groceries. I routinely buy groceries for my mother 2wk-6month at a time on offer, it saves her =A3380/yr which with interest rates so low makes a big difference. The savings went into Investec Global Energy early 2009 (oil 45$pb now 80-86$pb) and in turn offset energy bills - oil prices fall, bill falls =3D no lose; oil prices rise, bill rises =3D no lose.
#5 - It allows opportunity purchases for appliances. Obsolescence, end of year, recession can bring bargains with heavy discounts and free 5yr or even 10yr warranties. This is particularly useful for washing machines, but can be useful for TVs where "only 1 HDMI but S-IPS" can be priced at clearance levels.
#6 - You can set up a payment D/D to clear the whole balance at due date. Note however this carries a risk whereby fraud on your card can trigger a large payment. To this end you may consider closing the card after a time or requesting a new number (I do it annually on business cards, if refused I close the account).
#7 - A C/C is a useful emergency tool. Example being stuck in the middle of nowhere, cash sat in a current account doesn't do much. Keep it in a zipped part of the wallet.
#8 - Cashback on purchases. This is oft ignored but can mount up, a typical familly should be able to get =A340/yr cashback on groceries alone, fuel and other spend could potentially push that to =A375/yr.
Work things carefully and C/C for bulk-buy & cashback can put 20-40/ month into an investment - car repairs, appliances, prudently timed (Aug-Sep re end-of-line) laptop replacement. Over 20yrs in the right investments that can really get substantial despite inflation, gordon & devaluations not withstanding. The old days of 0% balance transfer and 0% fee AND 4% interest on cash deposit are gone - a pity :-)
So a C/C can be used smartly or very stupidly...
- It is called revolving credit - make it revolve, never pay the crazy interest charges.
- It is the most expensive loan - too many make C/C a loan at 17-25%pa interest vs 5-10% loan.
- C/C is not unsecured debt - many T&C permit conversion to secured.
- Never use C/C cheques
- Never use balance transfers - except where economics are in your favour.
- Note how credits are applied to interest owed - often cheapest debt pays off first
- Remember what bankers & government want - cash is evil because people see the notes vanish, plastic is everything because once people use it regularly they lose track of how much they spend and so spend more re VAT to Consumption Economy to unable to clear the balance every month.
If situations change resulting in a "mess", convert C/C to a loan and close all cards. That used to be the rule at Chase to Natwest any time you met a bank manager, sadly the fiscal prudence of 1984 is gone. It's all the debt you can carry, until you can't get out of it, then tax the profits it to fund nulabour. Banks are just a proxy for the state, taking the flak for idiotic credit policies & capitalising the profits whilst socialising the losses.
Tread carefully with kitchens, make sure all parts are correct because things DO get discontinued. Carcases are carcases, the difference is the drawer mechanism, doors & worktops. Kitchen fitters earn commission on the # of cupboards fitted, irrespective if you end up wearing cupboards like headphones :-)
So you are wise to be careful, and actually rather nice to hear :-) However there are economic benefits to their prudent usage.
Check the VISA debit card protection carefully (T&C).