Used TVOA on EWR-DEL earlier this year. As noted, bring your emailed receipts verifying that India has granted you a TVOA to show to the check-in agent. Once at DEL, keep walking beyond the lines for the regular visa entry wickets to the special TVOA wickets. They will process you there. Quite efficient and painless. Note, that at this wicket, they only put a small stamp on your passport noting your TVOA. It is not the typical full-page entry for a regular visa. At hotels and domestic flight check-ins, personnel are not always familiar with TVOA and go searching through your passport for a full-page visa. You may need to point them to the small stamp.