Strengths: haven't tried these yet but I've been doing a similar thing for years now.What I do is fasten some old spd pedals to my handlebars and put an old pair of Sidis on my hands and hey presto!
Overall: I think my design has more flexibility than these gloves,e.g hand signals are easy,you just slip your hand out of the shoe,also you cant feel the cleats on your hands!
Strengths: Light,fast,bouncy,great handling,disc-ready hubs,a great frame to which anything can be added.A steal at 549
Weaknesses: pedals need changing straight away(toe clips),seatpost slips
Overall: This is the entry into quality mountain-biking,I even gave this bike a good hammering down the Glentress black runs and it was more than able.A worthy racer too.Excellent bike for the money,go and buy!