Aresti opinions
Well if you have a Kougar and have successfully flown it I think the Aresti won't give you any surprises. I will tell you that you should NOT exceed the recomended elevator thows though or you will lift off to soon and stall the airplane!
The Aresti tracks very straight on take off and even though it is a taildragger it's not difficult at all to get off the ground.
Mine met it's demise a couple of weeks ago due to my overzealous attempt at experimenting with the C.G. I will build another one in the future but I have learned that you should NOT have the balance more than an eighth of and inch back from the max recommended in the kit instructions. I hd mine 3/8" to the rear of the rearmost recommended and tip stalled it during a low slow fly by prior to touchdown. The plane was totally uncontrollable and hit the ground on the nose and the right wingtip, braking the fuselage into 3 peices. This is also a model that is not easily repaired once broken since the punched ply parts it is constructed from tend to shatter on impact, resulting in a LOT of peices to recover.
Like I said, if you have flight time on the Kougar you should be fine. If, however, you only have flight time on a trainer and are not VERY sure of your abilities, leave it on the shelf till you have some time with another low wing plane that is a bit slower and more predictable, like the Kougar is.