If your inventory generally simple and does not require many attribute, ecomdash will be ok for your size of the business. I have over 25K skus and all of them are unique by attributes.
First, ecomdash is very slow. Page loading and file exporting sometimes take forever. I'm with spectrum business, so internet speed is not obstacle, and performing good with other website. However, ecomdash page loading time can take up to 40 seconds, and exporting a 5 skus can take 40 minutes. Really?
Server seems not reliable. If you update the listing information then save the page, ecomdash will display same old information because of page glitch. Especially variation, and variation image. Seriously, I need to reload page more than 10 times to check if variation image actually listed or not.
Second, no variation support for Amazon. So If you have multiple Amazon account or selling on Amazon international (Amazon.uk, Amazon.ca, etc.), you need to create variation listing each site and can sync on ecomdash. There is no option you can add description, shipping template nor any details of attribute. Can you really call ecomdash as a multi channel listing tool??
Third, yes they support chat, phone, email support at no extra charge. However, you will not get an answer for what you are looking for. The biggest reason I do not wish to continue service with ecomdash is the support. Support rep will be nice. But just nice... never will get to the answer you are looking for. Always gave me information that I didn't ask for. Maybe they are just trained not to say something ecomdash can't do.
ecomdash starter pack is only $60 per month. I think it is good for starter pack. I would not pay more for my business size, since ecomdash can not handle for more than that. Review collected by and hosted on G2.com.