I bought a destroyer 5.8 from them last summer. It was a stock boat and very heavily reduced (look at
www.ribworld.com for details as there are some great reductions). I rigged the boat myself including retrofitting under deck trunking (not an easy task) so cannot comment on their riggingMy hull was reduced due to a cosmetic issue where the white hull has a slight grey fleck to it, which I really like so am happy! The hull is very solid and rides very well in rough seas (have been out in 1m+ choppy waves). It's a very dry ride and lands comfortably. The console and seats are also very solid with good gel finish. The seat pads and metalwork are all good quality and well finished. The tubes are well made and well stuck on.
There are a few down sides. Some of the smaller fittings are not the best (e,g, the front seat catch). There was insufficient sealant under the console so deck water got into the inside (it is very well attached however so not concerned about it detaching) and the humber logo on one of the tubes is peeling a little. These are all really easily rectified however and I knew what I was purchasing at the time.
I did have an issue where the transom is too long, which concerned me for a while but turned out to be a non issue. It was meant to be a 20" (long shaft) transom but measured at 21.5" so I couldn't mount the engine as they suggested. A few calls with them and they agreed that I should mount as low as possible and give it a go and if it were too high, they could shorten the transom for me. As it happened, the engine is fine mounted higher and probably performs better where it is.
All in all, the destroyer is a no nonsense, solid rib that performs really well and can handle the rough. It's well made but not as polished as some of the competition. With the discount I got, it was several thousand less than an Ribcraft 585, and so much nearer to collect. The Ribcraft may have been the nicer boat, bit I'm more than happy with the Humber and would replace like for like without question.
Phil M