Instruction: Generate an answer to the question by utilizing the information contained in the document.

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Question: What is the warranty? How expensive are the hepa filter bags?
Document: This vacuum is excellent. It's much quieter than the our previous 10-year-old canister vacuum, and it has much more suction power. The pile on our carpet looks greater after vacuuming. Bear in mind, though, that the replacement bags and hepa filter are expensive.
Suction is more than excellent and it is reasonably quiet. The only very minor criticsm might be that the door to the accessories is a little cheaply hinged and the lid to the hepa filter also a little cheap-feeling to open. But overall,everything else that counts is superior to any other cleaner I looked at even those that were more expensive.
The Hepa Filter has to be replaced periodically.- Economical Dust BagsEachDust Bag (MC-V150M)can hold a lot. The bags on this model have been re-designed to hold more dirt than the bags on older Panasonic models. A 3-pack is very economically priced.Ergonomics----------- The Power Switch/Slider has 3 modes: Off, Floor, Carpet.
Handy controls and accessories. Great supple hose that turns 360 degrees. The entire tube/vac head unit can attach upright to back of canister for storage. The pet piece clamps to the front and everything else on on board. Has GREAT hepa bags, and can take regular bags. It also has a second hepa filter which is reasonable in cost to replace. To go from carpet to floor--thumb is right near button.
Own it for 6 month.pros: Good suction. On/off switch on the handle pretty convenient. HEPA filter.cons: Fiber bags C-19 are expensive ($6-8 per bag), but can use paper bags as well.Good value for the money
I LOVE Panasonic canister vacuum. The handle of the vacuum is firm, sturdy, yet, contoured to fit a hand--any hand.Feel the power of the suction, as the debris flood through the vacuum hose, trapped cruelly by the palimpsestic layers of hepa filter, ultimately enveloped by the hepa vacuum bag.The design of the vacuum cleaner is cloaked with the smooth,clean line of modernity and simplicity.
The cord is long enough to allow you to vacuum large areas of your home and with a push of a large button on the top of the vacuum (with your foot) the cord retracts back into the vacuum for easy storage. It also has a very nice Hepa filter for those with allergies. Its not one of the cheap ones either. This one works! The brush on the main vacuum is easily adjusted with a foot pedal that allows you to set the height of the brush to 3 settings.
Purchased one month ago and seems to be a good vac thus far. Only used twice and I find it to be Quieter than expected. If used more, I can see how it could get more costly for bags and hepa filters when replacements need to be done. I will leave future comments as use of machine continues. Before purchasing this unit make sure you shop and compare. Prices will vary but amazon ranks higher than most others for fair pricing.
This vacuum cleaner works nicely but the bags are small and very expensive. I would spend a little more money and get a LG bagless as it is better.
I've been using the HEPA bags and they last a long time before they are full. Do note that the HEPA bags are expensive (at least in my opinion) so keep that cost in mind when purchasing this.
Answer: Warranty is for one year. If it needs warranty service, Panasonic makes you send it to an authorized shop that can be some distance from where you live. There are nearby shops that are capable of fixing them, but not for warranty work. Kenmore bags and filters, available at Sears and Kmart, work in your cleaner. They are easier to find and somewhat cheaper than the Panasonic number.