The first thing to note before discussing quality is that all sites get their products from more or less the same suppliers. So if you are worried that the shoes on one website are of lower quality than another, you should forget about that. Just pay attention to the quality of the replica designer shoes. Since the products are the same, the website should be chosen based on the best price, shipping costs, and their payment method (Western Union, credit card, etc.). Some sites will offer free shipping when ordering 6 or more items, while others will charge shipping no matter what you purchase. An example is marsportsshop:

They have a lot of great options, but shipping is more expensive than what we paid when ordering domestically. Base price $25, add $6 per 0.5kg. Most shoes weigh around 1.5kg, so you'll need to pay $38 for shipping on top of the product price. Otherwise, the store only accepts Western Union payments. Basically, Western Union is a cash wire transfer service. You wire cash to the recipient's bank account. If for some reason your replica designer shoes doesn't show up, you have no leg to stand on when trying to get your money back because you paid in cash.

If Western Union isn't a good option for you, then finding a site that accepts credit cards will be your best option. Many sites accept credit cards, but remember that you trust Chinese replica designer shoes from a Chinese replica designer shoes site with your credit card information. Obviously, in most of our cases, Paypal is the best choice because of its security and excellent buyer protection. In short: Most websites don't offer PayPal. There are some exceptions that will send you a PayPal invoice, but most sites don't offer this. What it comes down to is finding a reputable site with good reviews and a product and fee structure that best suits your budget.

Grade and quality

You'll typically see three levels on a website: *A/General

AAA

perfect

super perfect

super perfect

for real

What do they mean?

A/Regular – This is the worst quality of replica designer shoes. If you are looking for cutting precision, materials and detail, then this quality should be avoided at all costs. They were cheaply made and poorly designed.

AAA – A/level of average quality. They are made from slightly better materials and usually have better cuts, but still use inferior materials. These replica designer shoes are to be avoided for the most part, but there are some that are hit or miss, like the Jordan 4s or 5s. (Thanks /u/foamhead)

Perfect – These products are of much better quality than AAA, often using materials and cuts that are very close to the originals. However, if the shoe has any distinguishing features (the 11s are carbon fiber, the 13s are hologram, and the 5s are matte mesh), then it's clear that the replica designer shoes aren't authentic. These are good for swinging from a distance, but the flaws may be obvious when viewed up close.

SUPER PERFECT - These are essentially perfect, with all the restoration done to bring them closer to their authentic look and quality. For around $100, you can buy a more or less flawless pair of shoes. Some details may be off, which leads us to...

Super Max Perfect – This is the best replica designer shoes grade without the need to be authentic. If you can afford it, buy it. These are essentially super perfect solutions that solve problems and flaws. For example: The Jordan 5 SMP has an authentic cut toe box, creamy white mesh, and uses almost the same materials as the original. 13 features real carbon fiber and real holograms. The 12s features real carbon fiber and accurate taxi yellow. Prices for this grade go up to $140+. They are expensive, but you get your money's worth.

Authentic – This is the best grade. They are essentially genuine retail shoes produced without authorization. All cuts, colors and materials are consistent with retail versions. A typical flaw you will find is the color of the box. For some strange reason, unauthorized authentic boxes are often lighter or darker in color than the authentic ones. Please do your research on these and check out the reviews on YouTube for your specific replica designer shoes! Some still have very minor flaws that may be important to you. (The Cool Gray 11s are slightly darker than true Cool Grey, the Bred 1s have a slightly different cut around the insole, the Olympic and Oreo 6s have smaller areas where the laces go into the insole, etc.)

These are the levels of Jordans and Yeezys you’ll typically see. LeBron, Dunks, Kobe, KD, etc. all have the same quality. Some replica designer shoes will be updated to fix flaws (like the Tiffany Dunk High), but due to lower demand compared to Jordan/Yeezy, what you see is probably what you get.