In　this　paper,　the　numerical　properties　of　a　recently　developed　high-order　Spectral　Euler-Bernoulli　Beam　Element　(SBE)　featuring　a　C-1-continuous　approximation　of　the　displacement　field　are　assessed.　The　C-1-continuous　shape　functions　are　based　on　two　main　ingredients,　which　are　an　Hermitian　interpolation　scheme　and　the　use　of　Gauss-Lobatto-Legendre　(GLL)　points.　Employing　GLL-points　does　not　only　avoid　Runge　oscillations,　but　also　yields　a　diagonal　mass　matrix　when　exploiting　the　nodal　quadrature　technique　as　a　mass　lumping　scheme.　Especially　in　high-frequency　transient　analyses,　where　often　explicit　time　integration　schemes　are　utilized,　having　a　diagonal　mass　matrix　is　an　attractive　property　of　the　proposed　element　formulation.　This　is,　however,　achieved　at　the　cost　of　an　under-integration　of　the　mass　matrix.　Therefore,　a　special　focus　of　this　paper　is　placed　on　the　evaluation　of　the　numerical　properties,　such　as　the　conditioning　of　the　element　matrices　and　the　attainable　rates　of　convergence　(ROCs).　To　this　end,　the　numerical　behavior　of　the　SBEs　is　comprehensively　analyzed　by　means　of　selected　benchmark　examples.　In　a　nutshell,　the　obtained　results　demonstrate　that　the　element　yields　good　accuracy　in　combination　with　an　increased　efficiency　for　structural　dynamics　exploiting　the　diagonal　structure　of　the　mass　matrix.