I would certainly recommend these bags for the common financial day-tripper, but for more experienced savers I would recommend the the ribbed Titanium series for better grip, and frankly a little something extra from your Bank Bag.
I used these bags when I first started the saving business, and am proud to say that I've recently switched back after a frightening, and frankly exhausting, stint with the vintage Glam Rock bank bags.
My only problem with these particular bank bags is that the amount of coins that they require is always slightly more than I seem to have. However, I have overcome this error by compensating with writing a nicely worded "IOU" note (each one gently scented, but not smothered with, the delightful "Svetlana's Breath" for Men - another item I would highly recommend for the discerning bank-goer).
If you're looking for a bag with discretion, taste and accuracy, then I would recommend these bank bags for the first time user. Just be careful, as it does take rather a lot of time to use up all 100 bags, which leads to some fairly embarressing situations when it comes to paying for the groceries (I was forced to choose between my last three twenty-pence pieces and writing a cheque for a a £1.50 bottle of cologne).