Accidentally found this topic and think i should leave some comments. At least this is our module and we have also some experience to share
As one of our customer said: "All good things need time to develop". If you magento user for several years - you may remember how much bugs it has in the previous version - 1.2, 1.3,.. and upgrading of magento site to the newer version was a challenge.
But within time- within versions, most of bugs were fixed, the upgrade become easy(but still problematic in some cases).
The same with our software, we just on our start, we need time.
Let's answer some questions to find if this extension bad?
Some people mentioned that M2E Pro is buggy. Is it true?
Yes and No.
Each person has its own comprehension of the term - buggy. For one person - buggy software means that almost all features are not working properly. For other person buggy means, that just some button or link doesn't work.
You can consider magento as buggy software, OS windows as buggy software, etc because there also some bugs appears from time to time.
But the most important not the fact of the bugs, but the fact were they fixed!
Is M2E Pro really buggy?
Yes it is. It is buggy as any other software. Probably if we develop some extension like product slider, there was much less bugs. But for extension which integrates 2 complex platforms, it is obvious that not all bugs may be found/detected easy. Especially, that each magento store and products to list on eBay is unique. And the feature that works , let's say, on 95% of sites may fail on 5% of sites because of the specific products/settings, etc.
Is there no support?
No, there is FREE support. All requests sent from extension contact form go to the ticket system and responded by support. Normally, within 2-3 hours. In some cases, it may take longer.
Are the bugs ignored by developers ?
No, the reported bugs are fixed either ASAP if it is serious bug or within time if the minor bug.
Have the customers purchase updates/new versions ?
No, currently, all updates with fixes, new features are provided for FREE.
All the new version for the last 10 months were free.
Next version - 2.0.14 with Feedbacks, Combined Orders, Best Offer, etc will be released in beginning of January 2011.
Is there any problem with upgrades to the new version?
Yes, some of our customers had problems in the past.
But if they contacted us, we help to solve them their problems.So no one from our customer can say that he was left alone with his problem.
Are the developers happy that after upgrade to the new version module had some issues?
No, it is not normal, but remember, each magento site is unique, so there was and will be some problems with upgrade. And we do our best to have upgrade successful for 100% of sites. Because the upgrade problem costs us time - instead of concentrating on implementation of new features for M2E Pro, developers spend their time on support.
We still working on our extension. And we believe that we implemented just 20-25% of the possible functionality. So there is years for development ahead.