For this price the Gibraltar SC4425MB is great.
But I would buy (and have bought) the next time the SC-SBBT or the SC-LBBT (from Gibraltar, too) (this depends on the length you would like to have, because they have so many good features and cost only 10? more.
But if you can´t or don´t want to pay these 10 ?, this Product is very good, too.
It has not as many features as the others but the stability is very good, the handling is very good and the quality is as every Gibraltar product, too, very good.
So All in all the Gibraltar SC4425MB is great, but if you can afford the SC-SBB, I´d advise to buy that one