I spent 4 months researching options within the Boston area. I had a metal shell bulkhead door - both in the ground and on top. The entire unit was rusting and needed to be replaced. Contractors recommended cutting the unit out and putting in a concrete form, brick walls or pour concrete around existing unit. All bad ideas if you ask me. The Bulkhead man arrived on-time (AM after 2 hour drive in from NH) with 2 helpers (his own son’s). I was most impressed with the Bulkhead man team - not only did they do a fantastic job, the quality of the bulkhead used and the finished product just makes me smile every time I see it. It is water / air tight and most of all gives me peace of mind that it will never need to be replaced. You get what you pay for and the costs definitely justify the means. One nice thing the bulkhead man does is add a larger unit or collar to support a better fit and larger opening (depends on your situation). I think you get my point when I say - I beat the heck out of researching the bulkhead door vendors, installers and options. I must say that this was one of the best experiences and decisions I have made associated with my remodeling efforts. The team did a great job and was well worth the few extra money. Happy homeowner in Waltham, MA.