For several years now, I have been buying AR components and assembling them. At one point, I owned 24 assembled AR15s. Now, I only have 17 assembled ARs. I have used upper assemblies from Del-Ton, CMMG, STAG, DS Arms, DPMS, ADCO, Model 1 Sales, and LMT. I have used lowers from Del-Ton, CMMG, RRA, DS Arms, Essential Arms, Aero Precision, LMT, Lauer Weaponry, DPMS, Spike's, and a few others. I even own complete ARs from Colt, CMMG, Sabre Defence, and KMC. I have bought several products from BCM over the years, none of which have been BCM uppers or lowers. I have bought BCM BCGs, of which are top notch. BCM has built a good name for themselves and a good reputation. They carry good products. Their brand name uppers are of good quality, as is Spike's. To choose one over the other is going to a personal choice. Both are good choices. Personally, I would prefer the BCM over the Spike's, if money was not an issue. If money was an issue, I would go with Del-Ton instead of BCM or Spike's. They make wonderful upper assemblies at a fantastic value. Again, it is ultimately up to you.