I don't have a Spez bike but had the Tactic helmet which was replaced due to delamination eventually(long story), got the Ambush after that, had a crash which cracked the helmet and only had to pay in 50% for a new one. Got 2 pairs comp shoes(MTB) still going strong after about 5 years. I love my Power saddle. The saddle has been replaced twice due to the rails coming loose in the moulded part. The store owner said Spez won't replace both times but I can chat to the gent who handles warranties , the warranty gent replaced both saddles no charge and I left a happy customer.
I like the Spez gear but probably won't buy a bike unless it's an MTB eBike, the Spez eBikes seem to be better and more popular than the rest.