Bill, I've been a little tied up with a few things here lately. Sorry for the late reply. From my experience if you're simply looking to get the data from one place to another, alot of these providers will do that. I've worked with a few of them. Dominion (SelectQu and DataCube), Vauto, DMI, eBizAutos, homenet, Dealerdotcom (I tried to replace homenet with them) and AutoBase. After all of these, I've pretty much gone back to Homenet.
Chances are the root issue you're having with Intransit vehicles (I've ran into this alot) being syndicated out to your external accounts is coming from your DMS. More than likely the vehicle status is whats triggering it. Of course Homenet can filter the inbound feed for this. I'm sure they can see the field. They're just not doing anything with it.
How I would go about this (I've done this exact same thing in the past) is import the DMS status into your homenet account. You can easily have almost any rep there at Homenet to map this over to a field. I recommend mapping it to a "Misc Price" field. Normally they show 5 but theres actually a total of 20 that you can utilize or you can use the Misc Comments field as well. Once they map it in to whatever field you choose, you're good. Now, you don't need any assistance from their support once this is done for this issue. Now you can work with their Data Conversions tool ( Settings > Data Conversion Dashboard ). This is an awesome tool and very powerful if you know how to use it properly. In about 45 secs you can easily set up a data conversion like this and do a manual recache of the inventory and your done.
Ex: If Misc Price 15 contains (Your Intransit Flag) set that vehicle to a prep status.
(In case any of you are wondering, to put the car in prep status place a 1 in the "State" field. That will change it to prep status and essentially remove it from being syndicated out.)
You will prob need to double check with your site provider and see if they are getting a dedicated feed from the OEM. If you're on a OEM digital program, chances are your site is getting the primary feed (insert and delete) from them for both Ground and Intransit status and using your homenet feed for pricing, comments and maybe photos on new and using homenet as the primary feed for used cars (Insert, delete, comments, pricing and photos).
Something else thats not really talked about much is Homenets API. You can pull data from the API. Posting data back into the account via API is a diff story. HomeNet Developer Portal
Homenet has Data Export Conversions. Just the before the data gets exported out to whatever vendor you can have a data conversion happen. Move a price, Rename a field, insert a value, etc...
How many times a day is your inventory being syndicated out? They can push every 2 - 4 hours if you want.
I guess my question is, are you utilizing alot of these features now?
Changing syndication providers isn't fun at all. Lots of room for mapping errors and essentially tying up your time with chasing down the issue.
