Having worked in email marketing before, making a reliable template that just works in most major webmail platforms requires a LOT more work than doing the same thing for web browsers. If they work (and I haven't tried them, so can't provide first-hand evidence), then they are well worth the money.
Having to do email marketing as one of my job responsibilities, making something that both looks good and works is certainly not a trivial task that can be done on short notice just before you have to send the newsletter out.
