I have never run or seen an Exceed in person, but I do have a few Wind Hobby 1/16th buggies...and I believe Wind Hobby tunred into Exceed...or something along those lines. They are just OK. Not complete crap, but not built extremely well either. The buggy is electric and kinda rattles a bit while driving, even though everything is tight....it's quite a bit unbalanced and wobbles....etc etc etc
Parts will be mail order only, but available.....so from what I have heard from others...it's a 50/50 crap shoot. You may get a good one...you may get a bad one. A lot of it will depend on how it's driven as well.
Duratrax are also a crap shoot. I had a Warhead and loved it...but it's was difficult to work on. Never had major issues with it, but minor parts replacements just take longer with it. I don't see a huge problem with Duratrax, but they have had a LOT of bad press and most people hate them.
If it works for you....go run it and have fun. That's my motto anyway.....