I brought a Rockville from Kiteblading as My first buggy two years ago and It is great.
Deep seat so for being first buggy ,being pulled from side to side you won't get pulled out and you have more time to correct the kite/buggy.
wide axle so it is more stable and well built.
You will not fine the axle bowing like a radsail one.
For price it is a very good starter buggy and two years on I am still riding it and will not change it.