A few years ago, after having been a client for 10 years, i posted a rave review about these good people on Yelp. This note is just to affirm that after several more years of experience with Optimal, my appreciation and high regard for them hasn't changed! They are very sharp at diagnosing problems, even subtle problems,..they don't over-diagnose,..they are always helpful - and even generous at times! And they are wonderful people! I completely trust them and highly recommend them to all!