Non-AMS sunderers ?

[derito]

Now that we have a bazillion cert points I'd like to know if some of you tried the non-AMS sunderer variants.
The old sunderer was pretty cheap and could both heal and rearm friendly vehicles and now that they're separated I'm wondering how the sundie do when specialised in said area.
From the look of it, healing and ammo supply sunderers are now meant to be force multipliers for largish vehicle columns as that's the only way I can see healing/resupplying being remotely as useful as an endless stream of infantry.
I have no trouble seeing how infinite ammo could be useful to tanks columns (especially TR ones) but I wonder if repair sunderers are. Did they change the repair radius and speed ?
If any of you get to try these variants I'd love to know what your first impressions are.