I have to say the customer service is a lot better than other exchanges. I have completed 2 purchases so far by debit card and it went pretty smooth. You upload a quick video with your ID, face, and debit card for verification. The one issue I had was the fee for deposit with a CC says. 3.5%. Once I got the charge on my card it was 7%. I complained and got a prompt response that due to the fact they use overseas CC processor. That they additional charge was likely from my own bank. I have yet to verify this but I will post once I do. They also now have the option for US bank wire and bank transfer. I have not used this option yet and Im a little confused on the fee. Its says on the page $500 minimum deposit, 1% fee ($50 minimum). If this is a minimum $50 deposit fee it's ridiculous and more expensive than wiring money overseas to bitstamp or others. BUT I was assured by AMY on the instant customer service chat that the fee was 1% only and that my bank transfer of $500 would only cost $5.
Ill update if I get a chance to try it out.
Other than that the trade engine seems to work smoothly, the interface is simple to use. trade fees are comparable to other exchanges (only slightly higher) BTC withdrawal fee is .001
withdrawals processes instantly.
The market rate tends to run 5% or so higher that other US exchanges, I assume this is due to low volume or perhaps confusion about USD withdraw. There IS a USD withdrawal option with a 1% fee (with another confusing ($20 minimum) that AMY claims is only a 1% withdrawal fee.
Overall I would like to see this exchange grow and I would like to see the owner(s) pay attention to what the community wants and build the top US (or even world) exchange. I'm still suprised I havent seen more volume there already. I think the fees are a little confusing and the site looks a little scammy at first glance. I think if they added a chatbox feature people would feel more at home and comfortable, they could ask the opinions of others directly and clear up some of the first questions they have instantly. Worked well for mcxnow anyway.
UPDATE:
-----The extra fee I was charged on my deposit was a "foreign transaction surcharge" charged by netspend. Not by coin.mx. It appears to be because coin.mx's credit card processor is in Baku, Azerbaijan, that the banks may try to add a fee to your transactions. After I called netspend and complained the charges were removed.
-----The market rate at coin.mx has moved a little closer to the average over the past couple days and I suspect the volume is growing some, which is a good thing but until the volume here is comparable to the bigger exchanges there will not be enough liquidity here to arb which will keep the price higher (or possibly lower) than average
I have completed several buys and BTC withdrawals with no real issues other than the interface is slightly buggy. Sometimes when I cancel an order it will continue to show on the orderbook at the top regardless of real market price or currency. When you switch from BTC to LTC the chart and orderbook sometimes still show the last currency's price or symbol. I had to refresh several times throughout my interactions. One of the more scary bugs is I have logged out, closed the browser and re-opened the page and I was still logged in.
The site uses 2FA but I would feel more comfortable with google authenticator or authy support. Texts can be intercepted and the code sent may be able to be used at a later time. Overall the security is not bad. They ask for 2FA code for withdrawal also which is good.
I had one btc withdrawal which failed with no explanation but the 3 others worked fine.
I think a chatbox would be a great addition to the site. New users are more comfortable when they can chat with other users about their experiences etc.
The site is kind of laggy overall. I expect at some point they will need to upgrade their server and it's already slightly annoying.
I think if coin.mx can speed up the site and fix some a few bugs they will continue to grow. More traders will use the site if the engine is fast and the bugs are minimal and the that will increase the volume. I'd like to see more community involvement by coin.mx for example on reddit and bitcointalk. They should consider running with free trades for a short time or other promotions to get the word out. The more people see coin.mx posts and more positive reviews the more trust will be built and trust is important with exchanges as we all know.