I have a couple of brushs from that kit, they are nice the bristles are a little stiff but work and last. The combs bend all out of shape but last too. Couldn't afford the kit it costs $50 at our tack shop. Congrats on the new horse.
My grooming kit is a couple of different rubber curries, a dandy brush, soft brush, horse hair brush (like used for shoes works great for getting rid of the fine dust), hoof picks, a wide tooth comb, a human hair brush and homemade detangler, and conditioner. It is keep in a plastic caddy thing with a handle in the middle and two "pockets" on the sides.
When I was a groom for someone with show ponies they gave me two brush (both the same), a small curry and show sheen and small pulling comb and I had to make them show ready. Ug, talk about elbow grease.