The sound quality is reportedly very good and the FX are very handy for tracking. I use the ones on my MOTU more than I thought I would.
There are a few goofy things though. Like if you use the FX you loose all your digital I/O?!?! You also loose channels for the reverb. It also isn't patchbay friendly.
Reviews put the converters in high regard, but you wouldn't be able to use your A2D if you want FX.
Most people are fine running through the DAW anyway with some latency, so the integration would be nice.
Anyway I hate how companies cut corners like this. Might be fine for the small studio, but then when you expand, you have to do it in their direction.
I have been happy with my MOTU 828mk3. Again a little goofy since you can only have FX on the input or output. So for a full band I use a Mackie Headphone mixer or use the additional more-me inputs on my headphone amp. You get 8TRS I/O, then separate mains, FX sends and Reverb Return channels. Then on the front you get separate a Pre/DI Combo that don't use up 1/2 or something goofy like that. Plus you get the soft limiter too. Digital I/O is also solid and is available with FX all the time.
I like running mine on an External clock, but YMMV. It sounds good to me, but I don't think anything under $1k will beat your A2D Converter.