we rely on this product very heavily and it is a great replacement cartridge. However - it is often hard to find in stock at the store and I am forced to call mulitiple stores in order to find it.
I have a small office only 3 employees. The first cartridge I ordered from staples lasted a long long time. With the second one the replace ink lignt came on after 30 days. In the end it lasted 60 days total. I'm considering ordering another brand.
I had been ordering from Staples due to the fact that the cartridge was less than ordering it from Pitney Bowes. However the price went up $10 since I ordered just a short time ago. The cartridge does not last nearly as long as I think it should for [$]. I typically mail out less than 10 pieces a week and I have to replace the cartridge about every other month which is way too often for the amount I use it. I personally don't think the expense of the machine and supplies are worth it. I will start printing my postage online with USPS after my contract with Pitney Bowes is up.