I think g_1933's reaction is common for many non-Catholic Christians who don't have a very deep understanding of Catholic teaching regarding Mary; they think that paying honor to Mary detracts from the honor due to God.
Catholic teaching, however, clearly indicates that any honor payed to Mary is conduited through her to God; He is the vine, she is a branch. No honor is taken away from God by honoring Mary. To quote from Vatican II:
"The Blessed Virgin is invoked in the Church under the titles of Advocate, Helper, Benefactress, and Mediatrix. This, however, is so understood that it neither takes away anything from, nor adds anything to the dignity and efficacy of Christ, the one Mediator.
No creature could ever be counted along with the Incarnate Word and Redeemer; but just as the priesthood of Christ is shared in various ways both by his ministers and the faithful, and as the one goodness of God is radiated in different ways among his creatures, so also the unique mediation of the Redeemer does not exclude but rather gives rise to a manifold cooperation which is but a sharing in this one source.
The Church does not hesitate to profess this subordinate role of Mary, which it constantly experiences and recommends to the heartfelt attention of the faithful, so that encouraged by this maternal help they may the more closely adhere to the Mediator and Redeemer." (Dogmatic Constitution on the Church, Chapter VIII, Section III, Paragraph 62, emphasis mine.)
Mary can at times seem to be overblown in Catholic devotional literature, but that is devotional literature, which is not to be confused with dogma or doctrine.