[Savage GT]

The lack of front axle adjustment is the one thing that I don't like, you can sort it but it involves some work when the fronts don't touch the track.
Some models are more prone to not touching than others, I have yet to run my Mclarens so haven't got to setting them up.
Likewise the other set of holes you mention in the chassis, not all models have them.

Outright performance is not something I was worried about, I race like with like so not an issue.
For tracks like ours, swapping the 12 tooth motor pinion for an 11 is a cheap and worthwhile move IMO.

I love Revoslots for home use, because aside from the chassis nuts, pinion, and cheap neoprene washers, (and they are all a personal thing), nothing else apart from some time on setup is required to run well and they look good and feel quite robust.

Coming in a little under the price of an NSR and a little over the likes of the latest Scaleauto and Sideways, and in the same area as the latest Avant slots, I feel these are fair Value for money given essentially no parts require changing.
Horses for courses, as they say :)